Items, NPCs, quests, objects and spells of patch 1.12.1, read live from the realm itself.

Runic Stone

NPC	Level	Zone	Chance
Anubisath Guardian Elite	62	Ruins of Ahn'Qiraj	26.6%
Anubisath Warder Elite	63	Ahn'Qiraj Temple	23.8%
Anubisath Defender Elite	62	Ahn'Qiraj Temple	17.0%
Anubisath Sentinel Elite	61	Ahn'Qiraj Temple	16.7%