Borumm was a male weasel, formerly a Rapscour in the Rapscallions under Damug Warfang. He and his companion, Vendace, were sympathizers of Damug's brother and rival, Byral Fleetclaw. Dissatisfied with Damug's rule, they and a stoat named Lugworm tried to assassinate Damug but were captured and sentenced to life in chains. They escaped, however, with about 30 scouts, and tried to flee the Rapscallions.
They were quickly recaptured by Rapmark Skaup, and sentenced to death by being slung into the river with stones tied to their necks.