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#6: The Fang of Critias Dragons During the Waking the Dragons arc, Kaiba unlocked the Fang of Critias card, which could fuse with three of his best trap cards to unlock a trinity of destructive dragon fusion monsters

Regrowth effects of various sorts on chaos seems to be a well that Planechase planes like to draw from

*The model number and rarity are not unified unless it is a high rarity one

Dragons, Divine Dragons, Double Dragons

However, if there are easy repeatable methods of gaining life (even Ajanis Mantra, given that there will presumably be more lifegain/drain payoffs), then Epicure of Blood could be a surprisingly decent win condition in a grindy deck, or a way to get in those last few points of damage