The hydra monster was very much real and it cause the deaths of many humans in the swamps of northern Europe. A total of 24 hydra monsters have been captured and kept in captivity. They are not going to be destroyed because they seem to be extremely useful to guard many hidden treasures that the order keeps. These hydra monsters have been placed in swamps in the perimeter that some of these treasures are kept. All humans and aliens that have tried to get near these areas have been annihilated by the hydra monsters.
The order believes that the hydra monsters came here with an alien ship and the aliens left them in swaps all over the world to see how they would behave on Earth. Their home planet is not known at this moment.