Tomb of Forgotten Knowledge

This Card can be your Commander

{p/b}{p/u}: Give target card in your graveyard Flashback {x}, where {x} is it’s mana cost.

{u}{b}{t} Put target card in your exile on the bottom of your library.

If a card with the same name has been cast 10 or more times you may pay {p/b}{p/b}{p/r}{p/r}{p/u}{p/u}, if you do transform this card.