Hatred, Wretched Abyss

Devour X, where X is the number of nontoken creatures you sacrifice to activate this ability.

Hatred, Wretched Abyss cannot attack unless there are 13 or more creature cards in your graveyard.

When Hatred, Wretched Abyss dies, you may pay life equal to its power. If you do, it deals that much damage to target opponent and each creature they control.
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The obsidian vortex of primal agony and unquenchable fury, the crimson maelstrom of blood spilt in anger.