Silver-Grey Snapdragon

There is one tameable creature with this look.

Silver-Grey Snapdragon
Can Be Tamed
Nar'anan, Nazjatar
Retains its original name after taming.
Siltstalker can be found on the steps of a ruined building in the south-east of Nar'anan. She's tameable at level 120 despite being level 121.
Level scaling: In Shadowlands 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.