Goblin Slayer Side Story: Year One, Vol. 8 (manga) — Kumo Kagyu

Goblin Slayer's promotion exam begins in earnest! He and his examiner set out on the trail of a handful of goblins for what seems like an ordinary quest, but the evident scope of the problem grows larger the farther they travel. If only the watchful eye and piercing questions of the examiner were all that Goblin Slayer had to worry about -- this horde is being led by a kind of goblin more dangerous than any he has seen before...Meanwhile, after Heavy Warrior collapses due to overwork, Young Warrior's party is sent to investigate the source of the recent earthquakes in his place, but the answer they find is something they never could have imagined...!!