This is a special dungeon that you can challenge through the Elnea Castle Warp Gates that's dangerous and full of Demons.
You can obtain more experience here than in a regular dungeon, as well as acquire powerful skills with special effects and precious items like Mountain Corps Dragoon Mail.
Both children and adults can challenge, and you can explore it with your family or characters who are good friends.

You can exchange precious Wicked Bloodstone found in Hellfire Lair at the Muscle Hall in Yano Market for several powerful weapons.
*Missions must be completed to collect the Wicked Bloodstone at the Muscle Hall.
*When playing with imported save data, weapons already obtained on the smart phone version will not be in the shop.

More details on the official game page of Challenge Dungeon "Hellfire Lair" ...