An illusion . . . is something that deceives the mind or senses by creating a false impression of reality. Illusions are often (though not always) related to visual perception, as in optical illusion. A mirage, such as the phenomenon of perceiving a sea of water in a desert, is a type of illusion. (Dictionary.com)
This is an illusion:
(from Literary Devices)
You will find an excellent list of literary allusions here.
One of my favorite allusions is in Shakespeare, the Motley Fool, alluding to Chaucer’s Chanticleer.
You can find As You Like It here.
1. Draw one illusion.
2. Write one allusion.