Death

Indestructible, shroud, Defender
{x}{x}{b}{t}: choose X different creatures, put 4
time counters on each chosen creature.
{b}{b}{t}, Discard a card: Remove a time counter
from target creature.
At the Beginning of your end step Remove a time counter from each creature with a time counter.
If the last Time counter or all time counters
would be removed from a creature, that creatures controller sacrifices it.