Shows the name of fixate target of Frostbound Devoted mobs in the Kel'Thuzad encounter (Sanctum of Domination), comes with personal warning (by default a pink glow around the nameplate and Boxing Gong sound effect) which can be modified in the Conditions tab.
This is the same weakaura as "M+ Spiteful - target on nameplate Xeraph Edit v1.1.0-2" ( https://wago.io/NPWlnnxt1 ) with custom options and load condition changed.