Alter Ego

When Alter Ego enters the battlefield, exile the top seven cards of your library.
At the beginning of your draw step, turn all cards exiled with Alter Ego face up. Exile the top card of your library.
You may cast nonland cards exiled with Alter
Ego by turning X land cards exiled with Alter
Ego face down rather than paying their mana costs, where X is that spell's converted mana cost.