Spooky's Cursed of Forgotten Vivo is Spooky's Jump Scare Mansion AU which has a theme like UTAU Dusttale and crossovers with Lost in Vivo

Lore
Spooky has become irritated about her army and specimens because they become frailer in eliminating many survivors who come to her mansion. One day she decides to do something before learning about the deity "Bayagothot", She decides to find a way to communicate with them and succeed before Bayagothot gives her a deal. If Spooky kills her specimens, she will get their power but in exchange, she needs to give some part of her mind to Bayagothot before saying "But it will be unnecessary in the end", Spooky sincerely accepts the deal without knowing that the deal she makes is a curse.

Later after one of the survivors arrives, Spooky starts the plan by giving all of her specimens a last chance to do their burden and if they fail spooky will eliminate them and get their power instead. After many specimens fail, Spooky body starts to have sticks appear around her body and she starts feeling worse and worse, In room 750, Spooky decides to abandon the plan but it's too late. Her mind is damaged enough for Bayagothot to take control of her before answering Spooky "But It will be unnecessary in the end" is doesn't mean that the curse will be gone but It means that her mind is unnecessary because Bayagothot gonna use her as they new vessel.

In the end, the survivor finds Spooky in the last room helplessly waiting for the time for Bayagothot to do the next action, every time she moves a cracking sound like her bones cracking can be heard but she is unable to cry out the pain because her mouth is missing. the only thing the survivor can do is leave the mansion and forget about what happened that night. Spooky has become more powerful but the cost is too much for her.

Spooky's Jump Scare Mansion and Lost in Vivo by Akuma Kira