The C Cube was created by Artemis Fowl, sometime between the second and third books using a hybrid of fairy and human technology (fairy technology was obtained by using the computers in the LEP helmets that Butler acquired from LEPretrieval One in the first book). It is stated by Foaly as being "obsolete underground", although Foaly is unable to stop it from pinging them . The C Cube is fifty years ahead of human development schedule.