Courageous friend, please wear the Demon Shirt. It really brings out your eyes. Take this Bottle of Holy Wind to the Polar Palace.
Go deep into the West Branch of the Polar Royal Palace, use the Bottle of Holy Wind, and the Dark Lord will appear. Fight with all your might to expel the evil of Vani from the Ancient Polar Ruinss.
Station Officer Mogo awaits news from you.