Whirlwind Raven Witch

Flying
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until the end of turn.)
{2}{u}, {t}: Retire an artifact you control; search
your library for up to two sorcery or instant
spells, reveal them, add them to your hand, then
shuffle your library. (The retired card goes to your graveyard; you gain 2 life.)