Amutar, Nexus of Oracles

Flying
Whenever you deal combat damage with a
sphinx, exile the top card of your library face
down until the end of your next turn.
Once per turn you may choose a sphinx you
control and exile it with two time counters on it.
if it doesn't have suspend, it gains suspend.
If you do, you may play one of the face down
cards you own in exile without paying its mana
cost as long as its mana value is no greater than
1 + the mana value of the chosen sphinx.