Lerna's Labyrinth is an individual dungeon located south of Shanghai. * Entrance Fee or Key: [Hydra's Claw], obtainable from [Pointry] for 100 battle points or purchasable from the market * Minimum Level: your Main Character must be level 105 or higher to enter this dungeon * Formation: 6 characters (Main Character + 5 Mercenaries) * Battle Type: Normal Battle * Time Limit: 1 hour * Extend Time: For 1 Atlas Ore, you can extend the allotted time by 10 minutes. * Reward: Hercules' Loot * Bosses: Lord of Lerna * Cooldown (CD): 20 hours