The peace of the training grounds is disturbed by the screams of those working on rebuilding the village. Goblin Slayer tells his students to form a defensive posture and await his return; if he doesn’t return due to death or injury, they’ll have to take care of themselves.
Slayer meets up with his party and other experienced adventurers, and they prepare to head to the tunnels in order to stop the flow of goblins. Priestess fears the rookie fighters will be targeted by the goblins already above ground, and asks to lead them on her own.
While Slayer and his pals do their thing in the tunnels, The goblins do indeed target the younger weaker kids headed home. They’re able to hold out until Priestess arrives with Wizard Boy, the Rhea warrior girl, and the other older fighters.
While everyone fights back the goblins, who are both on the ground and in the trees, Wizard Boy actually stops and thinks properly about what he can and should do. He doesn’t need to be a goblin slayer here. His job is to protect the others.
Taking a page out of the Dwarf’s book, rather than simply tossing fireballs at the enemy, he uses a spell in order to amplify his shouting, causing the large-eared goblins to flee in pain. Rather than chase down and massacre them, everyone uses the opportunity to pull back to the safety of the town.
As for the adventurers in the tunnel, Slayer has the Dwarf blast a hole in the ceiling, above which is a lake that floods all the tunnels. He then has the mage use ice magic to freeze the water and cause the tunnels to crumble. The goblins are beaten above and below ground without too much trouble.
For her efforts apart from her main party, Priestess ranks up to Steel, and while she surely earned it with her heroism and poise, she still intends to prove she’s worthy of the rank, both to her friends and to herself.
As for Wizard Boy, he came out of the battle with a realization: he doesn’t need to avenge his sister by becoming a copy of Goblin Slayer. Instead, he intends to go adventuring and learn more about how to be a proper wizard.
He’s accompanied by the Rhea warrior girl, who doesn’t take no for an answer and actually induces a jolly laugh from Slayer. As they take off on their adventure together, Cow Girl stands beside Slayer, noting how happy he looks. It was a good night for the adventurers and a bad night for the goblins. Why wouldn’t he be?
P.S. I love how the OP, featuring “Entertainment” by mili, goes SO FUCKING HARD. The vocals, which range from tender and docile to downright Wagnerian, really match Slayer’s inner turmoil and seething rage against goblins.