Parasite

<A System in a way is simply power source that can emulate spirit or soul>

<In the same way a spirit or soul is made up of Pure Energy, so system. Similarly, it can also transform its pure energy into other various forms>

<However, what it cannot do is collect other forms of Energy to convert into Pure heal itself. A system can only fix itself with pure energy.>

Ning thought for a moment and frowned a little. A System did sound a little too close to being a spirit with how it was made up of Pure Energy and even had some intelligence that grew from it.

He heard how it used the power in itself to do things that were otherwise impossible. 'So that is how it creates energy where there is no energy to create,' Alex thought. 'It takes it from itself.'

However, he saw another issue. "Surely a System doesn't have an unlimited power source," Ning said. "Does it never just run out of energy and die?"