Touya and the others head to ruins on a new quest from the Guild to defeat a dullahan. There they encounter the ancient royal capital, abandoned after the capital was moved a millennium ago.
After finishing their quest, Touya and the others explore the underground ruins for treasure. Yet what they find isn't a mountain of treasure, but a magic beast made of crystal!
No attacks work on its hard body, it absorbs magic, and it even regenerates from wounds. Touya and the rest struggle against such a powerful creature...
What on earth is the true identity of such a magic creature?!
If you're going to use your brain, 
I wish you'd use it to help the shop.
إن كنتَ تنوي استخدام عقلك فأفضّل
أن تستخدمه للمساعدة في أعمال المحلّ
Wenn du schon deinen Kopf einsetzt,
könntest du das auch für das Geschäft tun.
Si planean usar su cerebro,
podrían ayudar en la tienda.
Si vais a usar el cerebro,
podríais ayudar en la tienda.
Quitte à utiliser ta tête,
fais-le pour gérer l’auberge.
Se avete tanta voglia di usare il cervello,
 sarebbe carino che lo faceste per il negozio.
Se vocês quiserem usar o cérebro, 
gostaria que usassem para ajudar a loja.
Если всё равно работаешь головой,
лучше бы применил её для пользы лавки.