Iruxos

Iruxos is the demon whose dismembered hand is kept by the Burning Blade cult in the Thunder Axe Fortress of Desolace. The Hand of Iruxos is the artifact they use to open portals at the Mannoroc Coven and summon demons into the world.

The quest requires the player to venture into Thunder Axe Fortress and, using the, to chip away the red crystal protecting the  which contains the Hand of Iruxos. Once the Demon Box is exposed, Iruxos is able to manifest his essence in physical form to defend his hand, appearing as Demon Spirit.