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

Artifact — Book

Mana Cost: {4}

When this artifact enters, you take the initiative.
{T}: Add {C}. If you have the initiative, add {C}{C} 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.

Rare · Commander Legends: Battle for Baldur's Gate · #685 (CLB)

Illustrated by Titus Lunter