SCP 5999, This is Where I Died

Cognitohazard
This is Where I Died enters the battlefield
with 7 containment counters on it. When a
creature with a Cognitohazard counter on it dies, remove a containment counter from this card.
When all containment counters are removed
from this card, sacrifice this card; each player Sacrifices all creatures they control and lose life
equal to the amount of creatures with a Cognitohazard counter that died this way.