Academy of the Infinite

Academy of the Infinite comes onto the battlefield tapped.

{t}: Add {w}, {u}, or {b} to your mana pool.

{t}, sacrifice any number of permanents: Add {1} for each permanent sacrificed this way.

Whenever you sacrifice a permanent, return a target card from your graveyard to the top of your library.

"Where knowledge is never lost, and the price of learning is infinite." — Orath, the Mana Seeker