MTG Salvation

Remember we also need to not control any Xathrid Necromancers during a computation.

Arcane Adaptation doesn't work because it allows an opponent's goblin Boom Keg to have creature types, and thus survive a computation with damage marked on it and later be killed.

Harmonic Prodigy is a unique way of multiplying triggers that may be helpful for layers, provided it doesn't break something in the core engine.

Out of time might be useful, though we'd have to be careful about the possibility of hiding things through a hyperstage transition.

In the current deck, the core engine relies on not being able to do basically anything at instant speed during certain parts, so Paradoxical Outcome doesn't work. Goblin Dark-Dwellers is also not currently used.

We can use an uncounterable spell to solve the first issue

Double Major is another legend copier which is instant speed; if we can keep copies of creature spells on the stack throughout most of the combo

Teach by Example is a Dual strike without the cmc mv restriction

Grinning Ignus was just spoiled, which could be a source of colourless mana. Though the sorcery speed restriction is possibly too constraining.

Edit: Another source of colourless mana is to use Animating Faerie on a Forsaken Monument so it can be mutated onto and copied

A few ways to add mana without tapping:
- Ardent Electromancer
- Birgi, God of Storytelling
- Arni slays the troll / The Bloodsky Masacre + Vorinclex, Monstrous Raider

By the way, we do have a way to cheat on mana: Chandra, flame's catalyst

Shepherd of the flock messes with computations

In fact, the opponent still has access to some mana since our Show and Tell allows them to play their Wastes
Of course, there are alternatives if we need them

Mana Crypt doesn't require paying mana into like everflowing chalice does

We only need to do one computation per iteration of the top-level stage in order for the second level stage to act like the "real" stage without losing value in the long run.

Say the stack is something like:

- Gravitic Punch copies
- Gravitic Punch TYS triggers
- Worldfire
- Whatever triggers we need to recover after a worldire
- Stage triggers

Then resolving a Punch gets us X life, which can be used for updating storm, permanents, and setting up one computation; taking X to BB(X). It can also be used to build the top level stage but that doesn't get us to significantly more than BB(X).
After we run out of punch copies, we resolve through the hyperstage transition, use up a few triggers from the next stage, and rebuild the punch copies. So the next level stage is second-level stage is the one that repeats BB(X) a lot(overall computing BB_{omega}(X)), just like the top level stage would have been had we updated storm and permanents earlier. In the long run it's only as though the hyperstage had one fewer stage in it, which doesn't make a difference.

Edit: Since we can't have any woldfire TYS triggers, we also can't have gravitic punch TYS triggers so there will only be one of them, but I don't think that makes a difference to this logic

The issue in that deck is that during the hyperstage, Restore can also get Fountain of Cho, and with Amulet of Vigor that gives us white mana early.

An idea I had for an improvement is to cut the buyback instant. Since we can wait until a Gravitic Punch to update the number of permanents, we should be able to afford waiting until then to update the storm count too. Resolving one punch gets us life proportional to the number of creatures in play (which is BB(X) at that point), half of which can be converted into storm with Lingering souls (in turn updating permanents by casting instants).

Tibalt's Trickery could be useful if we can afford to mill enough cards, and we can ensure it's not possible to get started without it. Would replace Show and tell + maybe some opening card draw.

Maybe a Nexus of fate could absorb the unwanted mill (though then we're unlikely to be saving cards), or maybe Recoup + Blue Sun Zenith (which already exists in some of our decks) could be used (expensive though).