There is a little context as to how Karn went back in time, He was designed to be a Time Traveler Originally (hence why he is made of Silver, it is apparently immune to the damage from time travel) and he has traveled back through time before, so he has experience with it so going through a "Time Rift" to a specific spot in time isn't a huge leap for him to do.
Doesn't make much sense still though, but..well Time magic in MTG is strange anyways. *looks at Sarkhan*
Really now? I could have sworn it was brought up during the climax, by either Memmnarch or Karn when they were explaining why Memmnarch needed a planeswalker's spark to steal.
I think in Fifth Dawn Memnarch or Karn mentioned that they were an effect of the Plane destabilizing due to Karn not being there.
It could also be something that comes from pre-mending. Bolas senses someone with a spark on a plane he rules? Kidnap them and dump them on Amonkhet and see if they ignite.
One thing they really need to do to improve things however is have the Short Stories finish before the final spoiler list comes out that way the "major events" can be spoiled as cards with the short stories and things like Pia being still alive don't get spoiled by her card showing up before she shows up in the story itself.
I went to the comment they are sourcing it and the source implies he isn't 100% sure, see the other quote in my last post. Karn using a pre-formed plane is a guess he(the writer of the mirrodin block) is making in response to someone asking about Blinkmoths, he may not have the full authority to say exactly how Karn crafted Argentum(Mirrodin) though.
Having gone and read the wiki's source on that, I don't think that is a fully formed idea.
I hope that Maro clarifies exactly what effect the Mending had on artificial planes with this next block, even just a hand wave of "Oh it stabilized artificial planes so they won't collapse any further than they already have" would be a nice thing. Eh heck with it I will tweet at Maro see if he gives some clarification.
Have they ever said what is going on with Created Planes post mending in regards to them self destructing? Did the mending stabilize them all?
Overall Kaladesh was quite a fun ride, having the Gatewatch face enemies that do this thing, talking and actually having character as opposed to Generic Lovecraft-lite tentacle beasts. Pia and Yaheenei were fun to have around and the Reverse "super long lifespan" that most fantasy species have being reversed with Aetherborn was one of the better things WOTC has done in a long time.
Amonkhet being created by Nicol is interesting, one of the Demons that Liliana is bound too is also there. I wonder if that Demon is a natural one or one created by Nicol. The former would make for a very interesting situation as it likely would not want Nicol's rule to last forever.
I want to say in one of the Timespiral Novels, He did in the very least speak of worlds that he ruled there so the same theory applies even if the number of worlds isn't as large and he tried to recruit Radha, Heir to Keld to become a Gladiator on one of his worlds.
Having played with the Gearhulk in Magic Duels, I have come to think it can be very underrated, 3 or 4 damage is all you need sometimes to push an opponent into range for your other burn spells to finish them off.
Well, Nicol Bolas said that he Ruled 50% of the planes in the multiverse (don't ask me how you can rule half of infinity, ask the 30,000 year old god-dragon who made this claim) Theoretically pre-mending he presumably used the Infinite Consortium or something along those lines in order to trade among his holdings and now that planeswalkers can not do that as easily he needs something to keep his empires' trade going.
Lets just assume she is lying about her age to look impressive?
She tries Declaration in Stone again and takes 10 from DragonLady Kolaghan.
Saheeli and Felidar go full Splinter Twin.