So we're probably not getting any firm answers about this for a long time which means its time for wild speculation.
The first hint of this was Ugin's warning that the Eldrazi might have some kind of larger purpose in the universe beyond mindless destruction. We got further hints from Memories in Blood that Ulamog can, apparently, either create new lifeforms or transform his brood into new lifeforms.
The most detail we have comes directly from Emrakul however who speaks to Jace, making the following cryptic remarks while in the guise of Emeria in his mind:
"Everything ends. Everything dies. Wholeness is always behind us. Time points only one way."
"This is all wrong. I am incomplete, unfulfilled, inchoate. There should be blossoms, not barren resentment. The soil was not receptive. It is not my time. Not yet."
"Communication between us is difficult. I cannot talk to you. I do not even really know you exist. But you, your brain, it is very...adaptable."
When asked "are you even real" she responds: "I was personified a long time ago. Forces cannot be reasoned with. Agency does not exist in propagating waves. If you take shortcuts to try and grapple with what you cannot perceive, cannot even comprehend, who am I to gainsay? No one. You. Perhaps."
It is important to note that Jace isn't sure how much of this comes from Emrakul and how much is him reinterpreting things.
Sign me up in team "Eldrazi are cleaning up broken parts of the Multiverse." A nice twist would be if the mending would have never happened if Kozilek wasn't imprisoned and could have closed the timerifts, before they threatened to tear apart the fabric of reality.
Also, as someone else mentioned in the SOI thread (sorry, forgot your name) maybe the titans cleaned worlds in successive ways. First Ulamog consumes everything that is left, then Kozilek uses its reality warping powers to create a new framework, possibly fixing leaks or whatever else is wrong with the plane and finally Emrakul arrives to reseed the plane with life it has absorbed from elsewhere.
Infact, what if Emrakul is the reason why so many races are present on multiple planes?
Interesting clue might be in Nissa's words:
"Growth! Growth is the answer! The only answer! Entropy cannot lose. But must it win? Of course sacrifice must be made. Why do they fight it? Eternity without sacrifice offers only the screaming torpor. Blood must be churned, churned thick. Why do they fear life? Why do they fear truth?"
For those unaware, entropy is basically the "degree of chaos" and keeps rising, leading eventually to the heat death of the universe when there is no matter and all energy is just heat (yeah, extremely dumbed down explanation, I know). What if this is exactly what the Eldrzi try to fight?
Of course, the entropy cannot lose, but they try to keep it from winning.
Sacrifices must be made - if a plane becomes too disordered (and keep in mind that a plane is an entire universe, not just one planet), they destroy it and make it anew.
And the "screaming torpor" may well refer to the heat death, when all activity ceases.
If 'multiverse cleaners' is their function, isn't it odd that they're attracted to places with abundant sources of mana? You'd think they go to broken and mana-depleted places like Dominaria to start new life.
Unless mana is what they are trying to destroy. I seem to recall hearing that the Eldrazi predate colored mana; what if they predate ALL mana, because mana (or at least, too much of it) is what will eventually lead to the destruction of the Multiverse?
After reading today's chapter, I had the impression of the Eldrazi 'harvesting' matured planes, who had time to create a lot of mana. Innistrad being not ready yet could mean that it's not that matured yet, to be destroyed.
Perhaps too much mana on one place brings the multiverse out of balance and the Eldrazi keeping that balance by destroying such planes.
Maybe Ulamog the ceaseless Hunger who is attracted to mana is the first step of the mechanism, finding those planes, and then Kozilek and Emrakul follow with whatever their purpose could be.
If 'multiverse cleaners' is their function, isn't it odd that they're attracted to places with abundant sources of mana? You'd think they go to broken and mana-depleted places like Dominaria to start new life.
Unless mana is what they are trying to destroy. I seem to recall hearing that the Eldrazi predate colored mana; what if they predate ALL mana, because mana (or at least, too much of it) is what will eventually lead to the destruction of the Multiverse?
The Eldrazi do not necessarily predate coloured mana; they're colourless because they're above the principles of the five colours.
The Eldrazi do not necessarily predate coloured mana; they're colourless because they're above the principles of the five colours.
We have recently been told that they actually are older than the existence of colored mana. Though admittedly Maro is not surest source on storyline matters.
Well, he said on Blogatog that the Eldrazi are colourless not because they predate coloured mana, but transcend it. Either he's got Alzheimer's or is lying.
Would make sense, except that I can't recall any evidence in the literature that points to mana-rich planes as upsetting any balance. Surely Dominaria or Shandalar would've upset the balance within the Shard then (well Dominaria did, but due to Planeswalkers and their wars and time experiments). Unless the Mending had something to do with it that no one's aware of yet, and the Shard held the Eldrazi back somehow.
In any case, not only Ulamog is lured by mana because Nahiri explains that Emrakul's spawn follows leylines.
Hmm, well maybe Dominaria is an exception, because it is a special case being in the center and holding things together or something, iirc. Shandalar always seemed like a filler to me, not suited to carry out such a major block.
Anyways, that is my take one how the Eldrazi could possibly make sense and act as an useful part in that ecosystem. Emrakul leaving Zendikar instead of Ulamog seem not to fit perfectly though, right.
Would make sense, except that I can't recall any evidence in the literature that points to mana-rich planes as upsetting any balance. Surely Dominaria or Shandalar would've upset the balance within the Shard then (well Dominaria did, but due to Planeswalkers and their wars and time experiments). Unless the Mending had something to do with it that no one's aware of yet, and the Shard held the Eldrazi back somehow.
In any case, not only Ulamog is lured by mana because Nahiri explains that Emrakul's spawn follows leylines.
Hmm, well maybe Dominaria is an exception, because it is a special case being in the center and holding things together or something, iirc. Shandalar always seemed like a filler to me, not suited to carry out such a major block.
Anyways, that is my take one how the Eldrazi could possibly make sense and act as an useful part in that ecosystem. Emrakul leaving Zendikar instead of Ulamog seem not to fit perfectly though, right.
Well, he said on Blogatog that the Eldrazi are colourless not because they predate coloured mana, but transcend it. Either he's got Alzheimer's or is lying.
Here's a second statement that they are older than colored mana. The only reference to why the Eldazi are colorless I could find on Blogatog.
Actually Eldrazi visiting places loaded with mana makes sense. I mean as players (and planeswalkers), we would naturally find places with more mana better since it allows us to cast more spells and cause more destruction. We love to interpret the Eldrazi as solely wanting to "eat mana" and "destroy the plane", but that's technically what we're all doing across the multiverse. Time Spiral block could attest to that scenario, albeit not directly.
Do we really exhaust mana into nothingness when we cast spells of destruction, or does it, like some sort of energy become useless to us (but still existent) in the form of barren wastes, which only the Eldrazi can utilize effectively? The leylines were all artificially routed by hedrons/cryptoliths which can be arguably producing "waste/colorless mana" that attracts the Eldrazi in that case. The Cryptoliths could still produce colored mana probably because they were crafted in 2 years without Ugin's guidance, whereas the Hedrons had 40 years in-the-making with Ugin around, but ultimately their functions were the same.
I'd love to see the multiverse end up as "Oldwalkers were the real destroyers, Eldrazi were the real natural heroes and the Gatewatch was just a bunch of lost kids who had no idea what was going on actually."
Actually Eldrazi visiting places loaded with mana makes sense. I mean as players (and planeswalkers), we would naturally find places with more mana better since it allows us to cast more spells and cause more destruction. We love to interpret the Eldrazi as solely wanting to "eat mana" and "destroy the plane", but that's technically what we're all doing across the multiverse. Time Spiral block could attest to that scenario, albeit not directly.
Do we really exhaust mana into nothingness when we cast spells of destruction, or does it, like some sort of energy become useless to us (but still existent) in the form of barren wastes, which only the Eldrazi can utilize effectively? The leylines were all artificially routed by hedrons/cryptoliths which can be arguably producing "waste/colorless mana" that attracts the Eldrazi in that case. The Cryptoliths could still produce colored mana probably because they were crafted in 2 years without Ugin's guidance, whereas the Hedrons had 40 years in-the-making with Ugin around, but ultimately their functions were the same.
I'd love to see the multiverse end up as "Oldwalkers were the real destroyers, Eldrazi were the real natural heroes and the Gatewatch was just a bunch of lost kids who had no idea what was going on actually."
That pretty much agrees with my theory about entropy. Just like all energy in our world eventually becomes heat, all mana in the multiverse eventually becomes this "wasted mana". Or maybe it becomes heat too, who knows how magic thermodynamics work, the important thing is that it will become impossible to use and the Eldrazi are making sure it never gets that far (entropy connot lose, but must it win?).
And if this turns out to be correct, hats off to Wizards for implementing some fundamental real world physics into a fantasy setting.
That pretty much agrees with my theory about entropy. Just like all energy in our world eventually becomes heat, all mana in the multiverse eventually becomes this "wasted mana". Or maybe it becomes heat too, who knows how magic thermodynamics work, the important thing is that it will become impossible to use and the Eldrazi are making sure it never gets that far (entropy connot lose, but must it win?).
And if this turns out to be correct, hats off to Wizards for implementing some fundamental real world physics into a fantasy setting.
I don't think mana turns into actual heat (like in our world), C is their representation of "heat". Sure, if we took it literally we could still spend it on generic mana (especially artifacts), but that's just gameplay practicality that has to take precedence. The fact that MaRo explicitly mentioned that C as a mana cost requirement is still specifically unique to Kozilek (or Eldrazi in general) at the moment is probably the mechanic's best attempt in conveying only Eldrazi can make "(full) use" of waste mana and hence are the only ones who can slow entropy down. There's also the fact that Wastes as a Basic Land is usually an inferior basic land choice even by modern-day nonbasic-land-cannot-be-strictly-better-than-basics design principles.
The real problem is we haven't seen any Eldrazi naturally at work - Zendikar and Innistrad were all artifical destinations driven more or less by artifacts (which is a hint that artifice is indeed a huge generator of "waste mana", like how technology consumes more energy in our world generally speaking).
perhaps the answer will be revealed when the Gatewatch visits a world that was worked on by the Eldrazi. but thousands of years have passed since then, so maybe it won't be revealed initially, but they'll follow clues.
The real problem is we haven't seen any Eldrazi naturally at work - Zendikar and Innistrad were all artifical destinations driven more or less by artifacts (which is a hint that artifice is indeed a huge generator of "waste mana", like how technology consumes more energy in our world generally speaking).
We have, actually (unless someone like Bolas was involved). Although it was only Ulamog and just briefly.
The real problem is we haven't seen any Eldrazi naturally at work - Zendikar and Innistrad were all artifical destinations driven more or less by artifacts (which is a hint that artifice is indeed a huge generator of "waste mana", like how technology consumes more energy in our world generally speaking).
We have, actually (unless someone like Bolas was involved). Although it was only Ulamog and just briefly.
I should have been more specific - we haven't seen the entire progress of Eldrazi naturally at work. Sorin and Nahiri took the plane as lost (because honestly that's all they cared about) and left once it became apparently they couldn't defeat Ulamog. We know next to nothing about the history and conditions of the plane before Ulamog arrived and what happened after Sorin, Nahiri and Ulamog left the plane (did Kozilek pop by next?).
It was my mistake to say "we haven't seen any Eldrazi naturally at work", it's more of "we haven't gotten a valid example of the entire Eldrazi process at work naturally". As far as I'm concerned for now, that story was only exposition for Sorin and Nahiri being unable to defeat Ulamog and nothing more and while we did saw Ulamog work, I wouldn't count it as a valid example of any sort for these speculations.
If Ulamog is indeed in charge of "destroying" matter to make room for something new, what if Kozilek's job is to destroy the physical laws and boundaries. Then Kozilek creates a new "framework" for the plane with new physics and Ulamog fills it with by releasing all the consumed energy, creating mana, matter, light, etc.
Essentially, Ulamog and Kozilek recycle a PET bottle filled with sewage. Ulamog empties the bottle and cleans the water inside its body, Kozilek destroys the bottle (the physics that govern the plane) and reforges it into a new one. After that Ulamog returns the now clean water into the bottle. Then presumably Emrakul arrives and adds some flavour and a good dose of sugar.
On another note, some people have said that (if Emrakul truly creates new titans) new titans might be created from planeswalkers, but what if Emrakul actually turns entire planes into new titans? We know that Ulamog and Kozilek were big enough to shatter Zendikar, if they weren't destroyed. So what if Emrakul cocooned herself inside the moon to turn all of Innistrad into a new titan. This would also go hand in hand with how apparently all life that is twisted by Emrakul wishes to meld together with Emrakul and her spawn. This would also explain her passive ability. It only ever comes up if Emrakul willingly visits worlds that were not prepared by Kozilek and Ulamog, ergo in cases where both of them are dead or otherwise unavailable. (Barring cases where she was lured/trapped there by planeswalkers.)
Concerning the creation of new titans - I am no longer sure that they are even separate entities, since Emrakul takled about how "incomplete" she was...
Well, Emrakul described herself as a force of nature. Where does a hurricane begin and end? Gravity? The Eldrazi are as much separate entities as they are entities, probably not at all.
If the Eldrazi fight entropy does it mean eventually we'll get a Planeswalker who makes a contract with them and in the end becomes a new Titan after falling into despair?
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I previously have a personal theory that the Eldrazi might be to the planeswalkers what the Langoliers, Hounds of Tindalos, whatever are to time travelers (you may need to google them up), in that they may appear to clean up whatever mess a planeswalker(s) have made on a plane, and if the planes got destroyed in the process, they don't care.
Admittedly, Emrakul's words in the latest story article shows pretty much no support to it, so I think I'll think of any other possibility.
There's also another old personal theory I have that the Eldrazi might be related to the time rifts. Admittedly how that works is rather iffy, but otherwise I dunno how else to explain their destructive task.
I'd say that my interpretation of their purpose is this: the multiverse us not infinite. It only seems that way to us because we are small. In size as well as in scope of our understanding and awareness.
The eldrazi serve the purpose of recycling waste(d) planes and mana back into the multiversal ecosystem. Prolonging the multiverse's steady march towards entropy and oblivion.
we already did that.
Tazri saw a future billion years after Ulamog and Kozilek destroyed Zendikar and the plane was pretty much dead.
In the meantime, after Kozilek left the plane during that "alternate future" Tazri (probably turned into an eldrazi scion or so) tried to bring life back to the plane but miserably failed.
Also there is no sure record saying that the three titans "worked" together on every plane. On the countrary, Emrakul was lured to Innistrad while the other two titans remained on Zendikar, with Kozilek dormant. This pretty much implies that the three titans are independent entities and can be on different planes at the same time.
After Test of Metal and Tarkir, I don't trust the ability to only view one possible future as a valid definition of that future. In fact, if Kozilek leaves, his Brood Lineage should die off rather quickly (it's not a matter of being killed, apparently they just "die" when the Titan isn't around anyway), so Tazri couldn't possibly be an Eldrazi Scion for so long after Kozilek left.
Also, Emrakul was lured to Innistrad only after she left Zendikar - she had to be able to leave Zendikar first. The leylines designed to lure the Eldrazi were also designed to trap them on the plane (otherwise Emrakul could just leave Innistrad). I'm not buying any theories that Innistrad's lure was stronger than Zendikar's lure (considering it was a 2-year rushed job versus a 40-year refined system).
I suspect that usually for 1 Eldrazi Titan to free themselves from a plane by breaking the leylines it would take them enough time to obliterate the plane with their passive powers. The only reason Emrakul managed to leave was because all 3 of them were focusing on freeing one of them first, which would display some sign of recognition and intelligence.
Also, Kozilek wasn't actually dormant, but doing something unknown underground where Omnath was, considering Omnath was in BFZ but his background (which was underground) contains the Kozilek-Wastes already?
The Eldrazi don't work "together" in the sense of "at the same plane at the same time", in fact there's nothing to indicate they even follow a schedule. Ulamog and Kozilek could be done wrecking a plane and it takes 2 billion years later for Emrakul to find it, but the job is not considered "completed" until Emrakul is done re-creating it, which is why they work "together". 2 billion years should be no time at all for beings older than time itself anyway
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The first hint of this was Ugin's warning that the Eldrazi might have some kind of larger purpose in the universe beyond mindless destruction. We got further hints from Memories in Blood that Ulamog can, apparently, either create new lifeforms or transform his brood into new lifeforms.
The most detail we have comes directly from Emrakul however who speaks to Jace, making the following cryptic remarks while in the guise of Emeria in his mind:
"Everything ends. Everything dies. Wholeness is always behind us. Time points only one way."
"This is all wrong. I am incomplete, unfulfilled, inchoate. There should be blossoms, not barren resentment. The soil was not receptive. It is not my time. Not yet."
"Communication between us is difficult. I cannot talk to you. I do not even really know you exist. But you, your brain, it is very...adaptable."
When asked "are you even real" she responds: "I was personified a long time ago. Forces cannot be reasoned with. Agency does not exist in propagating waves. If you take shortcuts to try and grapple with what you cannot perceive, cannot even comprehend, who am I to gainsay? No one. You. Perhaps."
It is important to note that Jace isn't sure how much of this comes from Emrakul and how much is him reinterpreting things.
So what does everyone think?
Also, as someone else mentioned in the SOI thread (sorry, forgot your name) maybe the titans cleaned worlds in successive ways. First Ulamog consumes everything that is left, then Kozilek uses its reality warping powers to create a new framework, possibly fixing leaks or whatever else is wrong with the plane and finally Emrakul arrives to reseed the plane with life it has absorbed from elsewhere.
Infact, what if Emrakul is the reason why so many races are present on multiple planes?
"Growth! Growth is the answer! The only answer! Entropy cannot lose. But must it win? Of course sacrifice must be made. Why do they fight it? Eternity without sacrifice offers only the screaming torpor. Blood must be churned, churned thick. Why do they fear life? Why do they fear truth?"
For those unaware, entropy is basically the "degree of chaos" and keeps rising, leading eventually to the heat death of the universe when there is no matter and all energy is just heat (yeah, extremely dumbed down explanation, I know). What if this is exactly what the Eldrzi try to fight?
Of course, the entropy cannot lose, but they try to keep it from winning.
Sacrifices must be made - if a plane becomes too disordered (and keep in mind that a plane is an entire universe, not just one planet), they destroy it and make it anew.
And the "screaming torpor" may well refer to the heat death, when all activity ceases.
So, what do you think about this?
Unless mana is what they are trying to destroy. I seem to recall hearing that the Eldrazi predate colored mana; what if they predate ALL mana, because mana (or at least, too much of it) is what will eventually lead to the destruction of the Multiverse?
Perhaps too much mana on one place brings the multiverse out of balance and the Eldrazi keeping that balance by destroying such planes.
Maybe Ulamog the ceaseless Hunger who is attracted to mana is the first step of the mechanism, finding those planes, and then Kozilek and Emrakul follow with whatever their purpose could be.
The Eldrazi do not necessarily predate coloured mana; they're colourless because they're above the principles of the five colours.
We have recently been told that they actually are older than the existence of colored mana. Though admittedly Maro is not surest source on storyline matters.
http://magic.wizards.com/en/articles/archive/making-magic/battle-plans-2015-10-12
"The colorlessness represents how old the Eldrazi are, as they predate colored mana."
Hmm, well maybe Dominaria is an exception, because it is a special case being in the center and holding things together or something, iirc. Shandalar always seemed like a filler to me, not suited to carry out such a major block.
Anyways, that is my take one how the Eldrazi could possibly make sense and act as an useful part in that ecosystem. Emrakul leaving Zendikar instead of Ulamog seem not to fit perfectly though, right.
Hmm, well maybe Dominaria is an exception, because it is a special case being in the center and holding things together or something, iirc. Shandalar always seemed like a filler to me, not suited to carry out such a major block.
Anyways, that is my take one how the Eldrazi could possibly make sense and act as an useful part in that ecosystem. Emrakul leaving Zendikar instead of Ulamog seem not to fit perfectly though, right.
Here's a second statement that they are older than colored mana. The only reference to why the Eldazi are colorless I could find on Blogatog.
http://markrosewater.tumblr.com/post/65245326989/why-arent-the-eldrazi-green-they-go-around
They've also said that the Eldrazi transcend colored mana at times but presumably that is because they predate it.
Do we really exhaust mana into nothingness when we cast spells of destruction, or does it, like some sort of energy become useless to us (but still existent) in the form of barren wastes, which only the Eldrazi can utilize effectively? The leylines were all artificially routed by hedrons/cryptoliths which can be arguably producing "waste/colorless mana" that attracts the Eldrazi in that case. The Cryptoliths could still produce colored mana probably because they were crafted in 2 years without Ugin's guidance, whereas the Hedrons had 40 years in-the-making with Ugin around, but ultimately their functions were the same.
I'd love to see the multiverse end up as "Oldwalkers were the real destroyers, Eldrazi were the real natural heroes and the Gatewatch was just a bunch of lost kids who had no idea what was going on actually."
That pretty much agrees with my theory about entropy. Just like all energy in our world eventually becomes heat, all mana in the multiverse eventually becomes this "wasted mana". Or maybe it becomes heat too, who knows how magic thermodynamics work, the important thing is that it will become impossible to use and the Eldrazi are making sure it never gets that far (entropy connot lose, but must it win?).
And if this turns out to be correct, hats off to Wizards for implementing some fundamental real world physics into a fantasy setting.
I don't think mana turns into actual heat (like in our world), C is their representation of "heat". Sure, if we took it literally we could still spend it on generic mana (especially artifacts), but that's just gameplay practicality that has to take precedence. The fact that MaRo explicitly mentioned that C as a mana cost requirement is still specifically unique to Kozilek (or Eldrazi in general) at the moment is probably the mechanic's best attempt in conveying only Eldrazi can make "(full) use" of waste mana and hence are the only ones who can slow entropy down. There's also the fact that Wastes as a Basic Land is usually an inferior basic land choice even by modern-day nonbasic-land-cannot-be-strictly-better-than-basics design principles.
The real problem is we haven't seen any Eldrazi naturally at work - Zendikar and Innistrad were all artifical destinations driven more or less by artifacts (which is a hint that artifice is indeed a huge generator of "waste mana", like how technology consumes more energy in our world generally speaking).
We have, actually (unless someone like Bolas was involved). Although it was only Ulamog and just briefly.
I should have been more specific - we haven't seen the entire progress of Eldrazi naturally at work. Sorin and Nahiri took the plane as lost (because honestly that's all they cared about) and left once it became apparently they couldn't defeat Ulamog. We know next to nothing about the history and conditions of the plane before Ulamog arrived and what happened after Sorin, Nahiri and Ulamog left the plane (did Kozilek pop by next?).
It was my mistake to say "we haven't seen any Eldrazi naturally at work", it's more of "we haven't gotten a valid example of the entire Eldrazi process at work naturally". As far as I'm concerned for now, that story was only exposition for Sorin and Nahiri being unable to defeat Ulamog and nothing more and while we did saw Ulamog work, I wouldn't count it as a valid example of any sort for these speculations.
If Ulamog is indeed in charge of "destroying" matter to make room for something new, what if Kozilek's job is to destroy the physical laws and boundaries. Then Kozilek creates a new "framework" for the plane with new physics and Ulamog fills it with by releasing all the consumed energy, creating mana, matter, light, etc.
Essentially, Ulamog and Kozilek recycle a PET bottle filled with sewage. Ulamog empties the bottle and cleans the water inside its body, Kozilek destroys the bottle (the physics that govern the plane) and reforges it into a new one. After that Ulamog returns the now clean water into the bottle. Then presumably Emrakul arrives and adds some flavour and a good dose of sugar.
On another note, some people have said that (if Emrakul truly creates new titans) new titans might be created from planeswalkers, but what if Emrakul actually turns entire planes into new titans? We know that Ulamog and Kozilek were big enough to shatter Zendikar, if they weren't destroyed. So what if Emrakul cocooned herself inside the moon to turn all of Innistrad into a new titan. This would also go hand in hand with how apparently all life that is twisted by Emrakul wishes to meld together with Emrakul and her spawn. This would also explain her passive ability. It only ever comes up if Emrakul willingly visits worlds that were not prepared by Kozilek and Ulamog, ergo in cases where both of them are dead or otherwise unavailable. (Barring cases where she was lured/trapped there by planeswalkers.)
Modern - Cheeri0s (building), Belcher (building), Lantern (building), UW Control (building)
RIP Magic Duels. Wizards will regret what they did to you.
Admittedly, Emrakul's words in the latest story article shows pretty much no support to it, so I think I'll think of any other possibility.
There's also another old personal theory I have that the Eldrazi might be related to the time rifts. Admittedly how that works is rather iffy, but otherwise I dunno how else to explain their destructive task.
The eldrazi serve the purpose of recycling waste(d) planes and mana back into the multiversal ecosystem. Prolonging the multiverse's steady march towards entropy and oblivion.
After Test of Metal and Tarkir, I don't trust the ability to only view one possible future as a valid definition of that future. In fact, if Kozilek leaves, his Brood Lineage should die off rather quickly (it's not a matter of being killed, apparently they just "die" when the Titan isn't around anyway), so Tazri couldn't possibly be an Eldrazi Scion for so long after Kozilek left.
Also, Emrakul was lured to Innistrad only after she left Zendikar - she had to be able to leave Zendikar first. The leylines designed to lure the Eldrazi were also designed to trap them on the plane (otherwise Emrakul could just leave Innistrad). I'm not buying any theories that Innistrad's lure was stronger than Zendikar's lure (considering it was a 2-year rushed job versus a 40-year refined system).
I suspect that usually for 1 Eldrazi Titan to free themselves from a plane by breaking the leylines it would take them enough time to obliterate the plane with their passive powers. The only reason Emrakul managed to leave was because all 3 of them were focusing on freeing one of them first, which would display some sign of recognition and intelligence.
Also, Kozilek wasn't actually dormant, but doing something unknown underground where Omnath was, considering Omnath was in BFZ but his background (which was underground) contains the Kozilek-Wastes already?
The Eldrazi don't work "together" in the sense of "at the same plane at the same time", in fact there's nothing to indicate they even follow a schedule. Ulamog and Kozilek could be done wrecking a plane and it takes 2 billion years later for Emrakul to find it, but the job is not considered "completed" until Emrakul is done re-creating it, which is why they work "together". 2 billion years should be no time at all for beings older than time itself anyway