The Sand Leviathan is an optional boss in Etrian Odyssey IV. It has a wide range of AoE attacks, but damage can be easily mitigated via a Fortress' Party Shield skill. This boss can only be challenged by accepting the quest Revival of the leviathan; which requires the completion of both the Preserved by Ice and Forbidden Wisdom quests. The monster is located in the B3F of the Lush Woodlands, as accessed from the Misty Ravine. Its room is directly behind the Berserker King.