Simurgh, the Third

Indestructible, flying
{1}{u}{b}: Target creatures gets three madness
counters. (Remove one from each creature at the beginning of the upkeep. When the last is
removed, the creature deals damage to its
controller equal to its power and is sacrificed).
Endbringer Physiology—If Simurgh is ever dealt
exactly five damage by one source at one time, sacrifice her.