Jet Powerstone

{b}, Sacrifice Jet Powerstone, choose one:
- Pay {x}, destroy target creature with converted mana cost X or less, where X is {x} plus 2.
- Look at target player's hand, you may choose a nonland card from it, exile that card for as long as Jet Powerstone is in a graveyard.
- Return up to two creature cards from your graveyard to your hand, if you return more than one creature card then target player gains life equal to their combined converted mana costs.