From Glitch City Laboratories
The No Target Glitch is a glitch in Harry Potter and the Chamber of Secrets for PC that allows the player to use spells on objects that don't exist.
- Go to either the Gryffindor Challenge or the Slytherin Common Room.
- If the player enters the Gryffindor Challenge, there is a point in which a Spongify carpet appears after using the spell Diffindo on a rope. The player can use Spongify on the area where the carpet appears before the carpet is there.
- If the player enters the Slytherin Common Room, enter the library, and unlock the painting. Once unlocked, Alohomora can be used on the painting again.