Esper, god of the unknown

Indestructible, lifelink, flying
As long as your devotion to white and black
is less than six, Esper isnt a creature
{x}{w}{u}{b}: Exile X cards from all librarys.
You may cast four of them without paying
there mana costs until end of turn, if they are
permanents, they stay under your control. You
shuffle your graveyard into your library.