Death House

When Death House comes onto the battlefield, you place a plague counter on each creature your opponent's control.
At the beginning of your upkeep, you may place a plague counter on target creature.
{b}{b}{b}{b}: Exile Death House: Each opponent sacrifices all creatures they control with plague counters. You gain life equal to the total combination of all plague counters on those creatures. Activate this ability only if there are 10 or more creatures on the battlefield with plague counters.