Othelstan worshiped Tiamat through the Cult of the Dragon and controlled the village of Parnast nestled in the Greypeak Mountains. His duty was to monitor all visitors and merchandise passing through the village. He collected any magical items that were passing through the village and its surrounding area to be passed on to the Cult. From time to time, Skyreach Castle would pass through the area and collect whatever magical items had been captured. Othelstan kept wyverns on hand for the purpose of flying to and from the floating castle.
Othelstan was defeated when a group of adventurers came to Parnast and liberated the village from the clutches of the Dragon Cult.