The Lake Hydra is a monster in AdventureQuest Worlds.
The Lake Hydra is a multi-headed monster that is the first of the Chaos Beasts. It was imprisoned within a lake near Mobius until it was released by Escherion using the Runix Cube. When one head was defeated, another head took it's place. The players managed to defeat it by using it's fangs to break the rocks holding up Escherion's tower. Thus, the tower crushed it.
- Level: 10
- Location: Hydra Lake in Chiral Valley
- HP: 2,445
- MP: 100
- Cruel Hydra Blade
- Champion Hydra Sword (member)
- Hydra Spear (members)
- Deadly Hydra Staff
- Wizard's Hydra Staff (members)
- Hydra Battle Helm
- Hydra Armour (members)