"I—I don't know either"
Wang Donglin was a little flustered, but he hurriedly explained, "But I know how it came about. Exalted Immortal, you're now the State Overseer of Fengzhou, so you should know the process of the arrival of the Immortal Opportunities.
"Actually, it's not just the Lower World that has to prepare for the ritual. The Immortals and Buddhas of the upper realm have to be prepared before they descend, and they have to prepare an Immortal weapon bestowed by the Immortal Sect.
As long as there are no problems with the ritual in the Lower World, after the Immortals and Buddhas of the Upper World descend, formless Qi will gather on the Immortal weapon and condense into dewdrops. After seven days, they will form crystals.
"When we return to the Upper World, a batch of dewdrops will gather. After returning to the Upper World, they will automatically condense into crystals. These are the Heaven Dew Crystals.