The Balrog, Durin's Bane {5}

Legendary Creature — Avatar Demon
This spell costs {1} less to cast for each permanent sacrificed this turn.
Haste
The Balrog, Durin’s Bane can’t be blocked except by legendary creatures.
When The Balrog dies, destroy target artifact or creature an opponent controls.
7/5
Illustrated by Kekai Kotaki