Goblin Slayer Side Story: Year One, Vol. 9 (Manga)

"Goblin Slayer and his examiner infiltrate the goblin lord's lair and attempt to save a girl being held hostage--but Goblin Slayer takes a nasty hit to the head in the process...!! Will the two of them be able to make it out, or will his promotion exam end in something far worse than failure?! Meanwhile, having stumbled into a legendary sunken city, Young Warrior's party comes across a group of fearsome non-prayers carrying out a grotesque ritual. These rookies are clearly in way over their heads--but luckily for them, they're fighting alongside someone who sees this sort of thing as a light warm-up..."--Provided by publisher.