A large BOOM happened in the Nightmare Realm, Bill Cipher (who you can be) has opened 3 portals to other dimensions, his dimension Gravity Falls, and some others he found out such as, The Owl House, and Amphibia. Belos (who you can also be) and The Core (again who you can be) has learned from Bill Cipher and decided to take over three, Bill also found The Collecter and said “You can have these three worlds as a playground” Now heres the question. OC? Or The Villains: Bill, Belos, and The Core.