...
Shin had released an illusion barrier right after he had freed himself to cover the cameras monitoring the room. Then he used the limited amount of Mental Energy to fight the rest of the battle while working with Leonard.
The two were able to quickly end everything before the guards could even call for reinforcements.
Then, right after that, they quickly sat down and recuperated their injuries to make sure that they would be in their best condition.
Shin was able to immediately restore his Mental Energy within a short period of time before standing up and walking to Leonard. He then released his Mental Energy with the Fire Elemental Attribute and helped Leonard in healing his injuries.
Once they were done, the two stood up and swept their gazes at their surroundings.
"So, what is the plan?" asked Leonard.