The Librarian

Search through L-Space -Whenever you cast a noncreature spell, you may search target opponent's library for a nonland card with equal or lesser mana value and exile it, then that player shuffles. You may cast that card for as long as it remains exiled, and mana of any type can be spent to cast it. Do this
only once each turn

Ook -Whenever you cast a spell you don't own, create a Banana token.