<~*Chapter 41*~>
During the Trials of Exit, Scott was able to use his abilities but any other time he was in the dungeon, he could not. Basic telepathy and speed wouldn't work. His teleportation barely worked in the trials. And every time he did use his abilities, he would be extremely exhausted afterwards.
Technically, fighting the Dragon Lord counted as the final trial in the Trials of Exit, meaning, Scott could use his essence and his abilities.
Demons are probably the most complex creature on Ethereal. Their abilities differ from one another and they're more of an independent species. Most demons have similar features, including their blood red eyes. Some demons have abilities to change their appearance, disguising themselves as other essences. Other demons have magic like witches. And most demons have telepathy and teleportation.