Ocean, is the inverted sky.
In ancient times, there was a general named Cang, who after the chaos of heaven's fall, became an earthly general, guarding the reverse sea. There were also loyal souls from eight directions, who died in battle on land, their heroic souls returned to the sea, transformed into rain returning to the sky, eternally entrenched in the heavens as rain, never perishing for eons, capable of forging mythical weapons, even saints competed for them...
Wu Laoba, with a tongue like a rolling river, recited the ancient secrets his master told him to Ning Fan. Of course, Wu Laoba only understood the general gist, which was that the Eternal Undying Rain has a significant origin, and can be used to forge the legendary Ancient Map Dao Weapon.
"Ancient Map Dao Weapon..."
Ning Fan slightly savored Wu Laoba's words, for this was the first time he had heard of the term.
