He led an attack on the druid summit in Ashenvale some time prior to the Cataclysm. The druid summit was meant to reduce the rising tensions between the Horde and the Alliance, following the murder and skinning of a group of Sentinels in Ashenvale. Hamuul Runetotem was the only survivor of the attack, finding himself in a mass grave after being knocked out.
During the Blood War, he worked alongside remnants of the Twilight's Hammer operating within Blackfathom Deeps who were harvesting Azerite from the planet. They were encountered by the Alliance champions.
"For the nothingness that awaits."