Atheon, Time's Conflux

Indestructible, shroud, vigilance, menace
Erasure 3-(When this creature is delt damage, that
source gets a doom counter. After three turns, all permanents with doom counters are exiled. Players
with doom counters lose the game)
Exile 2 creatures you control: Remove a doom
counter from any target. Any player may activate
this ability.