Hydra was said to be a multi-headed monster that dwelled in the deepest trenches of the northern ocean of Euphoria. For obvious reasons, no one had ever seen whether this monster existed or not. No one but the Xyrans.
Though considering there was a trial named after it as well as the black murky water of the oceans, it could be debated that the Hydra was real and was responsible for the contaminated waters.
On top of that, the Trial of Hydra was one of the trials rarely ever assigned to anyone even in their fifth or sixth attempts which are often considered to be the final attempt.
That was the reason Ashton was the only one teleported to the trial zone, which happened to be a beach around the northern sea. When he left, everyone tried to dissuade him from entering Hydra's trial first. As no one had entered the trial in over a couple of centuries.
