Goblin Slayer Side Story: Year One, Vol. 4 (manga)
Description:... After protecting a village from a horde of goblins, a certain young man has been called "Goblin Slayer" for the first time. One day, while slaughtering yet another group of goblins, he finds a ring that glows with a mysterious light, which he has appraised by an eccentric magician who lives outside town known as Arc Mage. She, in turn, requests his help in compiling a bestiary for the Guild. He is put in charge of the section on-of course, goblins. With a single ring, and a single light, a brand-new story begins.
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