Pencilgon sends Sunraku and Oikatzo to the Iron Ruins of the Divinity to grind their levels to at least level 50. While there they encounter the Lifestide Lake Serpent monster.
But that weapon doesn't 
corrode in the normal way.
.لكنّ ذلك السلاح لا يسبب التآكل بالطريقة العادية
Aber was diese Waffe hat,
ist kein gewöhnliches Zerreißen.
No obstante, el efecto de estas armas
Seulement, comme tu peux le voir,
Ma sappi
Mas essa arma não
corrói de forma normal.
Но это оружие работает не совсем так.