Demise, Bringer of Darkness

Deathtouch, First Strike, Menace
When this creature is summoned or transforms for the first time, you take two damage and sacrifice a demon.
When an opposing creature dies, create a 1/1 black demon token with vigilance.
Whenever Demise is killed by an opposing creature, you take one damage and all other players gain one poison
counter.
{t}{b}{b}{b}:Return Demise from the graveyard to the battlefield with X +1/+1 counters on it, where X is the minimum number of poison counters on any one other player