The Drawkill's Organ(The Secret Revealed)

Experiment

William Afton was working on the animatronics one day when he had a "genus" idea to turn them into monsters so the place would be a horror location so he made a serum that would turn them into a demonic creature but when he did the serum they destroyed the place and when he came there as Springtrap the serum got on him he became on too