Karkethzerethzerus

Karkethzerethzerus (Karketh for short), also known as the Sable Despoiler is an ancient silver shadow dragon of Strathfell. It has not yet appeared on Critical Role.

Long time ago, Karketh annihilated a nation of wood elves and centaurs using the energies of the Shadowfell, turning the region into a petrified woodland that he now rules with gleeful arrogance and baleful suspicion. Due to the etheric rifts that connect Strathfell and the Shadowfell, minions of the shadow dragon like darklings and meenlocks know how to find their way to travel between the Material Plane and the Plane of Shadow.

Some good-aligned centaurs (the descendants of the ones slayed by Karketh) still battle the Sable Despoiler and his evil forces, even if they are few in number.

Abilities
Assuming Karkethzerethzerus was typical of ancient silver dragons, he is immune to cold damage. Because of his nature as a shadow dragon, he is also resistant to necrotic damage, and has a shadow breath that cause necrotic damage and can rise undead shadows from the corpses of his slayed enemies.