Omo was one of the friends of Feara who uncovered many of the secrets of Samaris? in the late 700's. He was actually a highly intelligent ratman who used to disguise himself as a human. Therefore he also knew his way around in the undercity, and could help in the various treasurehunts. Omo Muris actually means Rat Man in latin.

Rumour: Omo Muris still lives beneath Southport? as king of the Ratmen. He also has the secret of making Thunderdust.