Resurrection Extortionist

Tap an untapped Rogue or Warlock you control: target opponent may pay 4 life. If they do, you gain 4 life and they put a creature card from a graveyard onto the battlefield under their control. It becomes a black Skeleton in addition to its other colors and types. If they don't, they sacrifice a creature.
"Yep. A cleric. That's what I am. Drop in a donation to Godly McGodhood and I bring 'em back good as new."