Demagnetizing Helmet is an S-grade treasure. When equipped, this treasure will gives 60~150 extra points for all Jellies, but at the same time will make all magnetic aura effects from any cookie, pet, or treasure vanish.
During its first release, the treasure was formerly named Magnetic Helmet and said it will give a magnetic aura effect. Instead, the first release, using this treasure would remove the magnetic aura. This mistake was corrected after getting critical responses from users.