Piao Ling, Drifting Mystic

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Instant and sorcery spells you control have rebound. (Exile the spell as it resolves if you
cast it from your hand. At the beginning of your next upkeep, you may cast that card from exile without paying its mana cost.)