Innoruuk, the god of Hate.
Plane of Time Version
For event information, see this quest entry. Innoruuk drops three items from his loot table.
Plane of Hate Version
Crypt of Nadox Version
(information needed) After you kill the The Luggald Broodmother and chosen of Innoruuk mobs in the two rooms Innoruuk will spawn in the far room several guards to get to Innoruuk he casts a knock back spell which will aggro any mobs that respawn. He also strips all buffs you have.