Kraator

Kraator is a level 68 elite rare mob abyssal demon in Shadowmoon Valley.

Achievement
Kraator is a criteria of the achievements:

Patches
Prior to patch 2.4.0 Kraator was a formable opponent, as he had 95k HP and summoned infernals irregularly. He conflagrated like Razorgore the Untamed and General Drakkisath, and possessed a fire shield for ~500 Fire damage.