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|Level||Sea level to 5m above Sea Level|
|Location||The Dark Island|
The Hydra is the only city on The Dark Island. It was built by The A-Kong after the Ninja Civil War.
The A-Kong founded this place because he felt that the island needed more civilisation.
There is a secret, ancient, underground temple-like area beneath The Hydra. It can be acessed through stone slab covered in strange runes. More of these runes are covering the walls. Another slab is found on one of the walls showing the secret of defeating Craáin Sensei at Card Jitsu, using the Ninja Force.
Rikaarians. They inhabit the entire island.