Goblin Slayer Side Story II: Dai Katana manga volume 4 features story by Kumo Kagyu and art by lack.

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...