Light Grey Helhound

There is one tameable creature with this look.

Light Grey Helhound
Can Be Tamed
50-59The Banewood, Revendreth
Level scaling: Most NPCs will scale with the Hunter's level, within the constraints of their level range. Hunters can tame regular NPCs up to 2 levels higher than them, but can only tame elite NPCs of the hunter's level or below.