Flying
When this creature is put into your graveyard from the battlefield, put it into your library third from the top.
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 in a random order.)
Enigma Sphinx has 5 listed printings; the most valuable is the The List printing from PLST at US$0.54 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.
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