Impherus, the Witch Hunter

Instants and Sorceries that target you and permanents you control cost {2} to cast.
At the beginning of your upkeep, clash with target opponent. If you win, destroy target non-human creature that opponent controls. (Each clashing player reveals the top card of his or her library, then puts that card on the top or bottom. A player wins if his or her card had a higher converted mana cost.)