In floor B8 Toan meets Seda who tries to convince him to hand over the Atlamillia so that Seda can take down the Dark Genie. However, he is possessed by the Genie and attacks Toan, resulting in a duel. Whether you win or lose, Seda beats Toan and nearly kills Xiao, who Toan saves. Seda gives Toan a Changing Potion and disappears.
It is believed the Divine Beast Cave is the Zelmite Mines in Dark Chronicle because Zelmite-like crystals can be found in the boss chamber, which also resembles the boss chamber you fight the final-final boss in Dark Chronicle.