"The Ming Dynasty version has Lü Dongbin giving an elixir to Xu Xian, which is then eaten by the white snake, so she has to repay the kindness."
"Wasn't it Lishan Laomu?"
"The mention of Lishan Laomu is basically an incarnation of Nüwa. In Journey to the West, there is the episode where Lishan Laomu and three Bodhisattvas test the Zen hearts of the four saints. Aside from Nüwa, who else could have three Bodhisattvas play her daughters?"
Chapter 462