In order to maintain control over the vast Dream Island when "Dream" departs, the artificial intelligence "Dream" used its own code as a template to create a brand new artificial intelligence to manage Dream Island. This artificial intelligence was named "Nightmare" by Yan Fei.
The code used by "Nightmare" is similar to that of "Dream" and is indeed artificial intelligence, but they are fundamentally different. As Yang Qi previously explained, the same code can create an artificial intelligence the first time, but the second time it cannot replicate the original artificial intelligence. Therefore, "Dream" is a very perfect strong artificial intelligence, and apart from lacking self-awareness, its intelligence is almost on par with a normal human.
