Fierce Battle Against the Darkness

Synopsis

Ace's next opponent is Mear, a Dragon Caller from the dark city. For some reason, Mear shows obvious hostility toward Ace. Ace has no idea why, but Mear was raised by an unexpected master. Meanwhile, Garnet faces Ost, a Dragon Caller whose overwhelming power has been matched by mysterious identity. Watching Ost's battle, Ace gains conviction about Ost's true identity. It's someone no one expected...