Prophet of Truth

{t}: Gain control of target creature, artifact, or enchantment an opponent controls. Untap it.
Whenever you cast your first instant or sorcery spell each turn, reveal the top card of your library. If it is an instant or sorcery card, you may cast it without paying its mana cost.
"Who would doubt the Prophets? What have we foretold, that has not come to pass?" - Truth