After stealing it from a dragon, the grizzled warrior Zot Brastar was the new owner of a glow-in-the-dark Replica of the Legenedary Stone of Drems, Wishbringer. He told an unknown adventurer, who was seeking the replica, that he was willing to give it up in exchange for an egg of the Queen Corbie. Once the unknown adventurer returned with the egg, Brastar did not immediately give him the replica, but implied that he would not hand it over until the adventurer found a grue's fang that Zot had been hankering after. Whether the adventurer ever returned with the grue's fang, if they made some sort of compromise, or if Zot ever handed the replica over to him is unknown.

SOURCE(S): Beyond Zork sample transcript