Enigma Sphinx
{4}{W}{U}{B}
Artifact Creature -- Sphinx
5/4
Flying
When ~this~ is put into your graveyard from the battlefield, put it into your library third from the top.
Cascade (When you cast ~this~, 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.)