Lydia Ayer, Queen of Chaos

Whenever you cast a spell from your hand, exile
it, then exile cards from the top of your library
until you exile an instant or sorcery spell. You
may cast that card without paying its mana cost.
Then put all cards exiled this way on the bottom
of your library in a random order.
Whenever you cast a spell from anywhere other
than your hand, it gains storm.