Fenrithar, Lord of Shadows

Shadow's Wrath — Whenever Fenrithar, Lord of Shadows attacks, destroy all creatures defending player controls with toughness less than or equal to the number of creatures you control.

Pack of Shadows — Whenever a creature you control dies, all creatures your opponents control get -2/-2 until end of turn.

Unyielding Fury — Whenever a creature you control dies, Fenrithar gets +2/+2 until end of turn.
Indestructible Frenzy — Sacrifice a creatures