Impulsive Deed

Destroy target permanent. That permanent's controller shuffles all cards he or she owns from
exile into his or her library, then exiles the top
card. If it's a land, that player puts it onto the battlefield. If it's a spell, that player may cast it without paying its mana cost.
Rebound (If you cast this spell from your hand, exile
it as it resolves. At the beginning of your next upkeep,
you may cast this card from exile without paying its
mana cost.)