If there was one more thing to be noted out of the Shadow element, it was that..
It was troublesome and tricky to deal with. Unlike other mainstream elements, not much was known about the Shadows, because there weren't that many users of it in the first place.
Once you were caught and locked down, it was extremely hard to get out of. The shadows would chase you down no matter what you tried to do if you didn't know how to break the spell properly.
And a creature like Xenos.. Wouldn't stand a chance in figuring out the solution.
It was primarily built to fight and had a tanky body, making it powerful enough to live up to its name and terrorize others.
But since Reina was here with her technique..
It was game over, so long as Reina persisted in her efforts.
As Aria had predicted, the Serpent that had long gone dormant inside the box began to move once again.