Goblin Slayer Side Story II: Dai Katana, Vol. 4 (manga)

For the first time, the party descends to the second floor of the Dungeon of the Dead to put an end to the newbie-hunters—the real scruffy men. But to even have the chance to fight these heinous creatures of pure evil lurking in the dungeon depths, they must first find a way to conquer monsters that cannot be dealt with via conventional means...