Dragon Cliff Castle is found in Orobas Fjords and appears to be a ruined castle full of dragonknight worshippers. These people praise your visit as they believe you will be able to resurrect their 'master' Orobas, another DragonKnight who was sealed away. You can find Dragon Cliff Castle in between the Depleted Ore Mine and Stone's Flying Fortress. To open Orobas's Hatch, a worshipper nearby will give you the quest "Down the Hatch". After exploring the Orobas Hatch, you will be challenged by a band of slayers who were waiting for a Dragon Knight to come by. Afterwards, the small community will worship you as a new god and you will be granted a discount on the shops.