Kotadis, Unseen Mastermind

Flash, shroud, skulk
Whenever Kotadis deals combat to a player,
manifest the top card of your library. Whenever
you turn a card face up for its mana cost if it's a creature card, that creature has Cascade. (When
you cast the 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.)