Kxstix, the Soulripper

Eminence — Whenever a creature an opponent controls dies, add {r}. This mana can only be used to cast Kxstix or to activate its ability.

Flash

{2}{b}, Sacrifice a non-token creature: Deal damage equal to the sacrificed creature's toughness to target opponent; then create a token copy of that creature except it is a 1/1 Black Horror.