Steal The Forgotten Arts

Cast this spell only whenever you could cast a
spell you don't own.
Choose a card type other than land, then choose a
converted mana cost. Search target opponent's
graveyard, hand, and library for each cards of that
type and converted mana cost and exile them.
That player shuffles their library, then draw a
card for each card exiled from their hand this way.
You may cast these cards for as long as they
remain exiled, and you may spend mana as though
it were mana of any type to cast thes