The Obelisk Tip is one of the five fragments of the great Blackrock Obelisk of Pagan. It is the object of power of the Titan of Ether: the Avatar.
When the Obelisk was shattered by the Guardian, the Obelisk Tip was found by the Zealans and stored in the tomb of Khumash-Gor, where it would be safely guarded by his restless spirit. It stayed with him, until the Avatar found it there in Ultima VIII after defeating Khumash-Gor. The Avatar used it at the end to activate the power necessary to leave Pagan, when it melted into the newly created Obelisk.