Silver-Grey Nightsaber

There is one tameable creature with this look.

Silver-Grey Nightsaber
Can Be Tamed
Found in the Battle for Azeroth zone phase. Located north-east of the Maw of the Void whirlpool, to the east of the crevasse and north of a waterfall.
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.