A secret existed in Black Tides that would only appear during tidal recessions. Few were privy of this knowledge, only the powerful ancestors. Some entered Black Tides searching for it, dao lords included.

It pertained to an immortal weapon far superior to dao lord weapons, perhaps on the same level as the nine heavenly treasures. Of course, the nine only belonged in the legends; no one knew if they were real or otherwise.

On the other hand, people were sure that this immortal weapon was there in Black Tides, hiding in some unknown location.

Its name and origin remained...