The party encounters a giant mirror in the sewers. The mirror, the mysterious creature they encountered, the horde of goblins, and the goblin champion that appeared... Goblin Slayer and the others try to get to the bottom of what's going on. They once again encounter the horde of goblins as well as the goblin champion, which gravely injured Goblin Slayer previously. But Goblin Slayer had a plan to take care of them once and for all...

Episode 10.5 - Recap of the first 10 episodes.

The Cow Girl waits for Goblin Slayer to come back home and reflects on his childhood and his interactions with his new companions. We get to see why the Silver-ranked Goblin Slayer slays goblins through the Cow Girl's eyes.