Can Angel of Glory's Rise or Bruna, the Fading Light work? I guess the problem is how to reuse those angels. Halo Hunter can target Angels, but how to reuse Halo Hunter... this is tricky, since I've kinda lost the thread on how the hyperstage proceeds.
Edit: So, I had some ideas. Assembly Hall seems like a nice card that can retrieve a creature card, but only for those creature cards that we have multiples of. Unfortunately, we have multiple copies of Nylea's Disciple, and with Assembly Hall we could bring the second back any time we wanted, and play it for more than 3 life. Then I started wondering why we needed two Disciples in the first place - couldn't the Disciple be the target of Bone Harvest rather than Child of Alara? I figured out the reason to be that Nylea's Disciple only died when Child of Alara's death trigger went off, which kills off all nonland permanents including Vedalken Orrery. So we couldn't get the timing right to cast Goblin Dark-Dwellers when Nylea's Disciple is in the graveyard. Unless - we bring back Boggart Mob! Then, we can kill Child of Alara with Boggart Mob and Nylea's Disciple on the battlefield, with Goblin Dark-Dwellers exiled to Boggart Mob. The death trigger kills the Mob, bringing back Goblin Dark-Dwellers and allowing us to cast Bone Harvest.
Conservatively, that saves us a card at least. Getting more adventurous, that frees us from having to use Child of Alara to soak up an Extra Explosives; which means, we could potentially put in Muzzio, Visionary Architect again. Goryo's Vengeance won't work with Izzet Guildmage, but Time of Need should be okay in conjunction with Bone Harvest. Except, for that to work we need Swarm Intelligence or Thousand-Year Storm, and I believe that caused problems with Natural Order. Natural Order can bring back Nylea's Disciple along with the rest of our green creatures, and gain more than three life. With Centaur Safeguard, Natural Order can sacrifice it for 3 life. So we do seem to have a problem with Natural Order. Was there something wrong with Woodland Bellower? Hmm, I guess we can recycle it for the price of Smite the Monstrous, and so we can fetch Centaur Safeguard at a convenient time, so it doesn't cause us to use up Goblin Dark-Dwellers and Boggart Mob. So, I haven't got this quite to work yet.
In any case, this doesn't really address the problem that you brought up, since of course Muzzio is a Human. I'll keep thinking about it.
I'm not sure about Metallurgeon, but I'm thinking about Muzzio in fact does not go infinite with Scattershot Archer. We get an extra hasted Muzzio token each time we play it anyway; to have the nontoken killed by the Scattershot Archer, we would have to leave the nontoken in play and not sacrifice it to get a hasted token, so we would just be delaying the arrival of our token.
Collar the Culprit is also interesting. I haven't really tried to rejigger the stage sequence in a while, but I recall it seemed pretty hard to extend it.
You can target a lot of creatures with one Reality Spasm, then use Psychic Battle to change the targets to the Xathrid Gorgon Mimic Vat. So I think you do get a layer for just Reality Spasm. No wait, that doesn't work; never mind.
Perhaps Military Intelligence is better than Windreader Sphinx, since enchantments are easier to get back to make more copies.
Edit: Actually, you can make a lot of tapped copies of Xathrid Gorgon; with one hasted Xathrid Gorgon token, you can repeatedly tap it to target the original, create another hasted untapped token, and bring the original back with Bloodbond March. Then you can cast Reality Spasm for a lot and untap all the tapped tokens. So you do get a layer.
I picked Sylvan Echoes / Sentry Oak because it was really easy to trigger those, but if we can get started faster initially with Precursor Golem then that might be better.
I'm confused by the statement "In the megastage, we use Natural Order to get it back". It looks like we would need to trigger Natural Order via Spellweaver Helix, so it would only be only available in the gigastage. Did you perhaps mean Verdant Succession?
Otherwise, it looks good. Something we have to be careful with is using Natural Order to get back both Bodyguards, which would gain 6 life; we have to be sure that leads to a dead end.
So, the gigastage transition will allow us to bring Engineered Explosives and Goblin Dark-Dwellers back to our hand, which allows for two extra uses of Engineered Explosives. I don't remember what we used to soak up the second Engineered Explosives, but I remember that one of them was to bring back Child of Alara. However, we don't need to do that for the gigastage transition. So there might be a problem there.
To keep Spellseeker at a 1/1, we could go back from Dearly Departed to Thalia's Lieutenant, I suppose; I believe the reason for putting in Dearly Departed was to get an extra Spirit, which I don't think matters anymore.
Yeah, the fact that Centaur Safeguard is a death trigger means that Worldfire won't trigger it and we won't get 3 life for a gigastage transition, which is nice.
Sadly, I haven't been able to come up with any good new ideas. Maybe I'll look back at the former Doomed Necromancer version, see if we can get that working. We can't get extra creature stages with it, but just having a gigastage deck would be nice.
For Muzzio, we need to be able to bring Rust Tick back from the exile zone to our library somewhat cheaply. With the nontoken Rust Tick, a hasted Rust Tick token, and a hasted Muzzio token on the battlefield, we can
Tap the Rust Tick token for some Psychic Battle triggers,
Use one to destroy the nontoken Rust Tick and get another hasted token,
Tuck Rust Tick back in the library,
Tap the Muzzio token to bring it back to the battlefield,
Use another Psychic Battle trigger to bounce it back to our hand.
Play the Rust Tick and get Bloodbond March triggers,
Tap the new hasted Rust Tick token to get Psychic Battle triggers,
Use one to destroy Rust Tick and get a Rust Tick token,
Tap the Muzzio token to bring it back to the battlefield,
Use another Psychic Battle trigger to destroy Rust Tick and get another Rust Tick token,
Use a Bloodbond March trigger to bring Rust Tick back to the battlefield.
So we wind up with a profit of one Rust Tick token.
Shoot, I think there is a problem in the hyperstage. We don't need to create a Rust Tick token prior to tapping Moggcatcher to start the hyperstage transition, because Goblin Trashmaster can destroy our nontoken Rust Tick and create hasted tokens during the hyperstage. These hasted tokens can help us get any mana we need for the hyperstage transition. We can get the Mirrorworks trigger for Vedalken Orrery by playing both artifacts after Rebuild returns them to our hand. So, I'm not seeing anything that makes us use a Psychic Battle trigger from Rust Tick.
The original Metallurgeon / Battle Cry seems to be okay in this regard, since we need hasted Rust Ticks to untap for Battle Cry. I think another possibility is Muzzio, Visionary Architect, which just fetches artifacts from the library, so we need a hasted Rust Tick to destroy the nontoken Rust Ticks that we fetch. But the combos that can target artifacts don't seem to work. (unless there is something we have to do in the hyperstage transition that I am missing)
Looking at the start with Reforge the Soul a little bit, I agree that getting access to the full deck plus 6 Reality Spasms after two Reforge the Souls doesn't seem to be happening. But we should have a gajillion Consecrated Sphinxes ready for the third Reforge the Soul, so getting past F_{w^4 + w4 + 3}(5) shouldn't be a problem.
Hmm, that's a shame. I guess if we want to keep the Pull from Eternity version, we should go back to not having an infinite colorless mana combo, and use Eye of Ramos or Simic Keyrune for blue mana.
Ah, nice. The one issue is, can we move Mox Emerald in and out of the library as we need to? We can just mill the Mox and use Salvaging Station to bring it to the battlefield. Putting it back is a problem though. I guess we can just run the infinite combo long enough to generate all the green mana we need for the whole combo... sounds cheesy, but I guess it works!
Ah, nice. The one issue is, can we move Mox Emerald in and out of the library as we need to? We can just mill the Mox and use Salvaging Station to bring it to the battlefield. Putting it back is a problem though. I guess we can just run the infinite combo long enough to generate all the green mana we need for the whole combo... sounds cheesy, but I guess it works!
Hmmm... if there turns out to not be an easy way to get a shuffle, we can exchange Broken Ambitions for Cephalid Shrine, since I don't see a need for milling now that we have Pull from Eternity. (Perhaps I'm missing something)
Well, we need milling for Archangel's Light I guess. Perhaps if we switched out Archangel's Light and go back to Righteous Fury? (Or maybe Divine Congregation is better) Then we could remove Swarm Intelligence, and add a card that will refill the library. Riftsweeper is a possibility, or some card that moves cards from the graveyard to the library directly.
Edit: So, I had some ideas. Assembly Hall seems like a nice card that can retrieve a creature card, but only for those creature cards that we have multiples of. Unfortunately, we have multiple copies of Nylea's Disciple, and with Assembly Hall we could bring the second back any time we wanted, and play it for more than 3 life. Then I started wondering why we needed two Disciples in the first place - couldn't the Disciple be the target of Bone Harvest rather than Child of Alara? I figured out the reason to be that Nylea's Disciple only died when Child of Alara's death trigger went off, which kills off all nonland permanents including Vedalken Orrery. So we couldn't get the timing right to cast Goblin Dark-Dwellers when Nylea's Disciple is in the graveyard. Unless - we bring back Boggart Mob! Then, we can kill Child of Alara with Boggart Mob and Nylea's Disciple on the battlefield, with Goblin Dark-Dwellers exiled to Boggart Mob. The death trigger kills the Mob, bringing back Goblin Dark-Dwellers and allowing us to cast Bone Harvest.
Conservatively, that saves us a card at least. Getting more adventurous, that frees us from having to use Child of Alara to soak up an Extra Explosives; which means, we could potentially put in Muzzio, Visionary Architect again. Goryo's Vengeance won't work with Izzet Guildmage, but Time of Need should be okay in conjunction with Bone Harvest. Except, for that to work we need Swarm Intelligence or Thousand-Year Storm, and I believe that caused problems with Natural Order. Natural Order can bring back Nylea's Disciple along with the rest of our green creatures, and gain more than three life. With Centaur Safeguard, Natural Order can sacrifice it for 3 life. So we do seem to have a problem with Natural Order. Was there something wrong with Woodland Bellower? Hmm, I guess we can recycle it for the price of Smite the Monstrous, and so we can fetch Centaur Safeguard at a convenient time, so it doesn't cause us to use up Goblin Dark-Dwellers and Boggart Mob. So, I haven't got this quite to work yet.
In any case, this doesn't really address the problem that you brought up, since of course Muzzio is a Human. I'll keep thinking about it.
Edit: So, Assembly Hall plus two Moggcatchers will allow us to bring back Moggcatcher cheaply. But, Scattershot Archer can also destroy Metallurgeon or Muzzio as well. It just can't bounce them for more Bloodbond March triggers. Does this go infinite for either?
I'm not sure about Metallurgeon, but I'm thinking about Muzzio in fact does not go infinite with Scattershot Archer. We get an extra hasted Muzzio token each time we play it anyway; to have the nontoken killed by the Scattershot Archer, we would have to leave the nontoken in play and not sacrifice it to get a hasted token, so we would just be delaying the arrival of our token.
Thousand-Year Storm is nice, if we do need a Swarm Intelligence-type card in the main combo this will get us an extra layer at the end.
Collar the Culprit is also interesting. I haven't really tried to rejigger the stage sequence in a while, but I recall it seemed pretty hard to extend it.
Perhaps Military Intelligence is better than Windreader Sphinx, since enchantments are easier to get back to make more copies.
Edit: Actually, you can make a lot of tapped copies of Xathrid Gorgon; with one hasted Xathrid Gorgon token, you can repeatedly tap it to target the original, create another hasted untapped token, and bring the original back with Bloodbond March. Then you can cast Reality Spasm for a lot and untap all the tapped tokens. So you do get a layer.
I picked Sylvan Echoes / Sentry Oak because it was really easy to trigger those, but if we can get started faster initially with Precursor Golem then that might be better.
If we have an extra card, we can try something like
57 Sylvan Echoes
58 Sentry Oak
59 World at War
60 Reforge the Soul
to get something like F_{w^4+w4+3}(F_{w^4+w4+2}(big)).
Otherwise, it looks good. Something we have to be careful with is using Natural Order to get back both Bodyguards, which would gain 6 life; we have to be sure that leads to a dead end.
As I recall, we used Flash and Academy Rector for the Worldpurge version. Is Flash a problem?
Edit: Oh right, Flash was no good with Child of Alara.
To keep Spellseeker at a 1/1, we could go back from Dearly Departed to Thalia's Lieutenant, I suppose; I believe the reason for putting in Dearly Departed was to get an extra Spirit, which I don't think matters anymore.
Yeah, the fact that Centaur Safeguard is a death trigger means that Worldfire won't trigger it and we won't get 3 life for a gigastage transition, which is nice.
Sadly, I haven't been able to come up with any good new ideas. Maybe I'll look back at the former Doomed Necromancer version, see if we can get that working. We can't get extra creature stages with it, but just having a gigastage deck would be nice.
Tap the Rust Tick token for some Psychic Battle triggers,
Use one to destroy the nontoken Rust Tick and get another hasted token,
Tuck Rust Tick back in the library,
Tap the Muzzio token to bring it back to the battlefield,
Use another Psychic Battle trigger to bounce it back to our hand.
Then we get another Muzzio somehow (say with Goryo's Vengeance),
Play the Rust Tick and get Bloodbond March triggers,
Tap the new hasted Rust Tick token to get Psychic Battle triggers,
Use one to destroy Rust Tick and get a Rust Tick token,
Tap the Muzzio token to bring it back to the battlefield,
Use another Psychic Battle trigger to destroy Rust Tick and get another Rust Tick token,
Use a Bloodbond March trigger to bring Rust Tick back to the battlefield.
So we wind up with a profit of one Rust Tick token.
The problem is that we need to be able to put Rust TIck back in the library, and also that Goryo's Vengeance can bring Child of Alara back cheaply. So we probably need something besides Bone Harvest to soak up our extra uses of Engineereed Explosives.
The original Metallurgeon / Battle Cry seems to be okay in this regard, since we need hasted Rust Ticks to untap for Battle Cry. I think another possibility is Muzzio, Visionary Architect, which just fetches artifacts from the library, so we need a hasted Rust Tick to destroy the nontoken Rust Ticks that we fetch. But the combos that can target artifacts don't seem to work. (unless there is something we have to do in the hyperstage transition that I am missing)
I think Spellweaver Helix makes us exile sorceries in pairs, so we can't exile exactly 3. We don't need Eureka though, so that should be fine.
How are we killing Mana Vault with Goblin Kites and Goblin Trashmaster - do you just mean sacrificing the Trashmaster to itself?
I think we still need Broken Ambitions to put cards in the graveyard after Archangel's Light.
Could you describe your start in more detail?
Well, we need milling for Archangel's Light I guess. Perhaps if we switched out Archangel's Light and go back to Righteous Fury? (Or maybe Divine Congregation is better) Then we could remove Swarm Intelligence, and add a card that will refill the library. Riftsweeper is a possibility, or some card that moves cards from the graveyard to the library directly.