Harmless Offering

Target opponent gains control of target permanent you control.

Archfiend of the Dross

Flying
Archfiend of the Dross enters with four oil counters on it.
At the beginning of your upkeep, remove an oil counter from Archfiend of the Dross. Then if it has no oil counters on it, you lose the game.
Whenever a creature an opponent controls dies, its controller loses 2 life.

Render Silent

Counter target spell. Its controller can't cast spells this turn.

Price of Betrayal

Remove up to five counters from target artifact, creature, planeswalker, or opponent.