Goblin Slayer Side Story: Year One, Vol. 10 (manga) — Kumo Kagyu

Goblin Slayer and his examiner are backed into a corner when the rank exam goes wrong…but even a goblin lord is no match for the fearsome strategies Goblin Slayer can devise with a supply of explosive fire powder! Elsewhere, deep in the bowels of the earth, Young Warrior's party engages in fierce combat with the undead at the gates of an underground city -- they will soon learn the walls were built not to keep them out but to keep something in…