Daozi was doing this to save his junior brothers and sisters. The Eight-Armed Immemorial Demon Venerable was trying to undo the curse on his clansmen. Daoist Priest Scarlet Heaven aimed to support a Wielder of the Will to ascend the throne.
So, what were the wishes of Fairy Cheng Lin and the others who had put in so much effort to promote the '8.5-term Wielder of the Will Plan'?
"After Fellow Daoist Daozi attains 8.5 Heavenly Daos, I hope you can help me free my best friend who is bound by the Dao of the ancient Heavenly City," Cheng Goudan replied.
