Sarevok's Tome - Commander Legends: Battle for Baldur's Gate - #685

When Sarevok's Tome enters the battlefield, you take the initiative.
T: Add C. If you have the initiative, add CC instead.
3, T: Exile cards from the top of your library until you exile a nonland card. You may cast that card without paying its mana cost. Activate only if you've completed a dungeon.