Grim Sepulture

{b},{t}: Put a -3/-3 counter on target creature
you control.
{b}, Remove 3 counters created in this manner
from creatures you control: Target opponent
loses life until they have 1 HP remaining.
Exile this card.
Grim Sepulture cannot be untapped by effects
from spells. If Grim Sepulture would ever be
placed in a graveyard, exile it instead.