Goblin Slayer, Vol. 8 (manga)

On the night of the Harvest Festival, armies of goblins creep toward the city from all directions, held back only by Goblin Slayer's ruthless traps and reliable party members. Yet everything the adventurers are fighting to protect is threatened with destruction when the goblins' leader finally summons part of the ancient monster known as Hecatoncheir, the Hundred-Handed Giant. Is this a spell that can best even the Goblin Slayer...?!