Lin Fan could see what she was worried about, but he also knew that this was something that he had to do.
Chaos was an invader from outside their world, someone that wanted to destroy this world for its own gain.
Chaos as the name suggested was something that came from the void outside of the known world. It was a being that was made of pure chaos, which was why it wanted to create chaos in this world.
The more chaos that was created by Chaos, the more food that it would have to become stronger with.
That was why it wanted to weaken this world so that it could destroy it.
The one who had stood in its way was Lin Fan's past reincarnation.
Lin Fan's past life had been able to hurt Chaos in the first place, which was why it had done this to this world. It had wanted to weaken the world before destroying it, making it easier for it.
Chaos had of course slowly recovered over the countless years and was only getting stronger now.