Torata, Master of Diversion

Other spells you cast from your hand cost {1} less to cast.
Whenever you cast a spell, exile it. Then exile cards from the top of your library until you exile a nonland card that shares a card type with that spell. You may cast it without paying its mana cost. Then put the remaining exiled cards on the bottom of your library in a random order. If that spell had converted mana cost 7 or greater, repeat this