Death, The Inevitable

Indestructible, Menace
This spell cannot be countered.

When this attacking creature is blocked, it gains +X/+X until the end of your turn, where X is the highest mana cost among creatures blocking Death, The Inevitable this turn.

•{w}{b}{r}{r}: Destroy target tapped nonland permanent. Gain X life and deal X damage to any target, where X is that target’s mana cost. Activate only as a sorcery.