Rhy'zrd, The Mindsweeper

Cascade (When you cast this 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 of your library in a
random order.), haste, prowess
Noncreature spells you cast have cascade.
You may cast your exiled spells without paying
mana costs and and you take damage equal to
that spell's mana value.
Yeah, so, I'll take all of that.