Riot, Vindictive Spawn

+1: Target opponent sacrifices a creature. You gain life equal to the sacrificed creature's power.
-2: Return target creature card with converted mana cost X or less from a graveyard to the battlefield, where X is Riot, Vindictive Spawn's loyalty.
-7: You get an emblem with "Whenever a creature you control dies, return it to the battlefield at the next end step under its owner's control."