Out of the Tombs
At the beginning of your upkeep, put two eon counters on Out of the Tombs, then mill cards equal to the number of eon counters on it. If you would draw a card while your library has no cards in it, instead return a creature card from your graveyard to the battlefield. If you can't, you lose the game.
Enchantment
standard:
not legal
future:
not legal
historic:
not legal
gladiator:
not legal
pioneer:
not legal
explorer:
not legal
modern:
not legal
legacy:
legal
pauper:
not legal
vintage:
legal
penny:
not legal
commander:
legal
oathbreaker:
legal
brawl:
not legal
historicbrawl:
not legal
alchemy:
not legal
paupercommander:
not legal
duel:
legal
oldschool:
not legal
premodern:
not legal
predh:
not legal
High - Low
