The Illusion System was one of the important settings in the fantasy novel " Full-time Mage " written by Jiang Nan. It was a system that allowed the user to summon various magical creatures in the virtual world through magical techniques. The core of the Illusion City's illusion system was " illusion ", a magical technique that could manipulate the boundary between reality and virtual reality. Through the use of illusions, the user can transfer their body and consciousness into a virtual world to summon various virtual creatures, including dragons, elves, giants, and so on. These virtual creatures had their own unique attributes and abilities that could help the user complete various missions and battles. In addition to summoning virtual creatures, the Illusion City illusion system also had some other magic skills such as "illusion","illusion array", etc. Illusion was a magic that could create virtual scenes. It could be used for advertising, creating illusions, and so on. Illusory Formations were a type of magic that could create a virtual space that could be used for spatial teleportation, storage, and so on. In " Full-time Mage ", the Illusion City Illusion System was an important skill for the main character, Ye Xiu. It helped him gain a lot of valuable experience and resources in the virtual world, and it also became one of his important weapons against the evil forces.