Hades, Heart Reaper

+3: You get an emblem with, "At the beginning of your upkeep, put a -1/-1 counter on target creature. After 3 upkeeps sacrifice this emblem."
-X: Destroy target permanent with mana cost X or less.
-12: Search your library for a creature, and put it onto the battlefield under your control. It gains Haste. On your next upkeep, sacrifice it.