Nathan became wary after seeing the bunch of demonic energy crystals lying on the ground.
Nathan has only seen a demon once in his current life, and that was Temer, a demon that Nathan doesn't have a clue of his true power.
He can only conclude that Temer has an overwhelming difference in strength compared to him.
'I will be in danger if someone like Temer is really around here!'
With that thought in mind, Nathan heightened his senses so that he can immediately notice if there's something wrong within his vicinity.
After doing that, Nathan turned his eyes back at the demonic energy crystals on the floor and smiled.
"All of these are precious resources, I should pack it all up and purify it so that it can be used."
All of the information that Nathan has about demonic energy crystals came from the data from the control room.