mtg card deck builder Magic: The Gathering Ravnica Allegiance Builder's Toolkit | 4 Booster Packs The GatheringFINAL FANTASY Play Booster Amonkhet - Deck Builder's Toolkit

It also might not be a creature card

The Cycle of Sin Final Fantasy X is built around the cycle of Sin, a massive creature that rises to cull civilizations that grow too large or too advancedbut whose slaughter can be paused for a period of Calm years when a Summoner sacrifices themselves in a final battle against Sin to summon a final aeon capable of defeating Sin albeit only temporarily, locking the world in a cycle of destruction

It would be a tall order for any future card to be able to dislodge Pawpsicle from its throne.

I havent noticed many lifegain decks running around recently, at least not in Standard, but they do exist in abundance in Pioneer and Explorer, so it might be intended for those formats