Bites the Dust

Enchant creature you don't control
Enchanted creature has indestructible.
At the beginning of each end step, if you lost 3
or more life this turn, exile enchanted creature,
exile Bites the Dust, each player chooses three
cards from their hand and puts them on top of
their library in any order, return all nonland permanents to their owners' hands and each
player's life total becomes equal to their starting
life total.