Grimmkin

{3}{t}: The next noncreature spell you cast this turn has cascade. (When you cast that spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

"Shadows dream of endless fire, Flames devour and embers swoop, One will light the Nightmare Lantern, Call and serve in Grimm's dread Troupe."
– The Grimm Troupe