The Abyssal Shaft Rogu Horaizun : Season 2 Episode 3

Shiroe and his friends have come to the Depths of Palm to reach the Sacrifice Clan's gold. The underground labyrinth is filled with powerful monsters that wear them down in a war of attrition. Meanwhile, Akihabara, Akatsuki hears about the "Teachings". She's very interested to know that by completing a high level raid, she can greatly improve the level of her techniques.