Robby, Metamage

+2: Target opponent discards a card. If they discard an instant or sorcery this way, you may draw a card.
-3: Draw a card, then discard a card. You may destroy target creature or artifact with converted mana cost equal to or less than the discarded card.
-7: Put an instant or sorcery you own from outside the game into suspense with two time counters on it.