The Overseer

The Overseer is a parasitic abyssal resides in the Abyssal Nexus that serves to inform the player about the area. It is able to combine the three parts of the abyssal bludgeon (foot, spine, and claw).

It has resided in the Abyss for a long time, and stated it had participated in the Gielinorian God Wars, when Zamorak sought reinforcements from any reachable plane. The Overseer and its party had reached the abyss, seeking additional allies. However, the Overseer had found itself unable to escape, leaving him out of the God Wars.

It further explains the Abyssal Nexus contains Abyssal Sires, who are "engineers of this [Abyss] living pocket universe", and were imprisoned in the Abyss as well. As centuries passed on food began to deplete, and they were forced to construct the Nexus, using it to absorb demon flesh and weaving it into the wall's fabric, where they currently remain in deep statis.