Eternities Theorist

Whenever a planeswalker enters the battlefield, you may turn a creature you control face down. If you do, draw a card. (That creature may be turned face up at any time for its mana cost.)
Whenever a creature you control is turned face up, look at the top three cards of your library. You may reveal a planeswalker card from among them and put it into your hand. Put the rest into your g