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Dekadun is a four-floor facility once used as the residence and stronghold of Galvahad, the legendary hero of the Dekadun tribe. During the tribe’s final war, Dekadun mages sealed Galvahad within the Heart of Darkness and cast the entire structure into another dimension.

After strange phenomena began spreading through Dekaren, the dungeon resurfaced—still scarred exactly as it was in the last battle. Halpers and Cabals summoned during the war continue to guard the ruins, as if the conflict never ended. Crumbled walls and twisted iron bars reveal the brutality of the past, and rumors say that on the 4th floor a monster holding the Heart of Darkness still awaits.

Long ago, the palace where the Dekadun tribe lived was reduced to ruins in the war against Bulkan. After the fall, grotesque creatures began to appear—many resembling spiders—earning Dekadun the nickname “Spider Dungeon.”

It is said that a powerful monster, Harpoon, dwells deep on the 4th floor, and only those who push through the guardians can face what lies beyond.

From Lost Realm Castle, follow the road leading out through the South Gate. As you advance, you’ll encounter increasingly dangerous monsters along the route. Continue forward and you will arrive at the entrance to Dekadun Dungeon.