Aoi wa sózó idžó no Supekku wo hakki suru jó desu! (E08)

Gustave gives in to his burning anger toward the Seven Light Faith and unleashes Heaven's Flames, L'age Soliel. The city of Dormundt panics at the sudden attack, yet Tsukasa remains completely calm. He had already anticipated all of it, and was confident they could all weather the attack if they did what was required of them. So following Tsukasa's emergency manual, Domundt manages to avoid the worst case scenario. However, the Heaven's Flames aren't stopping. The fire spirits unleashed by the spell are compelled to continue their attack until the city burns to the ground. Faced with a predicament even their missiles couldn't stop, the world's strongest swordsman, Ichijou Aoi, rises to the challenge. (Crunchyroll)