Broog-Norb was a particularly large and grumpy ettin. Broog-Norb wasn't a follower of the Cult of the Black Earth.
In 1491 DR, Broog-Norb found a way to Tyar-Besil. He only had a temporary truce with the earth cultists, who were careful to stay out of his way. He usually resided in the abandoned kitchen until some adventurers infiltrated the temple and confronted and defeated him.