The Heart Locket

Item #: SCP-XXXX
Object Class: Safe Keter

Special Containment Procedures: SCP-XXXX is to be kept in a standard storage chamber inside Storage Site-19. SCP-XXXX-1 is to be given weekly psychological evaluation only by a male psychologist. Any testing with SCP-XXXX done with a female researcher is strictly forbidden.

Description: SCP-XXXX is a golden heart locket with the sentence "Not even death will part us" engraved on the front. So far, SCP-XXXX has been proven to any form of damage.The locket is inactive until someone wears it. Upon activation, the wearer (identified as subject from now on) will hear a male voice. Other staff have so far didn't report the voice and recording devices fail to pick it up.

The entity, designated SCP-XXXX-1, is the one producing the vocalization. If the subject is a male, SCP-XXXX-1 will ask if the subject knows Abigail White. If the response is affirmative, the SCP-XXXX-1 will ask the subject to return the locket to her. Further attempts at communication have proven futile until a new subject wears SCP-XXXX.

If the subject is a female, SCP-XXXX-1 will think that the subject is Abigail. SCP-XXXX-1 cannot be convinced that, in fact, the subject is not Abigail. Any attempts to remove the locket will fail unless the subject expires.

Addendum 1:
Under no circumstance should SCP-XXXX-1 be aware of the death of Abigail White. In the case SCP-XXXX-1 finds out about the decease, it will show symptoms of schizophrenia that will recover from one week after the incident. Any memory regarding the expiration will be forgot. The subject will show intense psychological damage that will result in suicide tendencies. The effect wears off after one week.

Addendum 2:
Any attempt to open SCP-XXXX will lead to immediately terminated, as the opening of SCP-XXXX will cause SCP-XXXX-1 to receive a class V ectoplasmic construct body and doesn't seem to be afeected by conventional weapons. Then it will become hostile to all Foundation personnel. So far this caused ███ casualties among Foundation personnel. Object class changed to Keter.

Addendum 3:
More interviews are to be conducted in the future. There has to be something more to this ritual. You aren't transformed into a killing machine for nothing.

Addendum 4:
Upon multiple missions, the former house of SCP-XXXX-1 was found. Inside, advanced thaumatic machines were found in the basement of the house. On a table a book was found. All the pages were too burned to be read.

Addendum 5:
He knows. He knows Abigail was killed by the Foundation. But his own mind tries protecting him from the truth. This is why became so hostile when the lid of the locket opens. I request the termination of SCP-XXXX as quickly as possible. Any rival groups can use this SCP against us once they find out it's anomalous properties. And next time we wont get so lucky.
-Dr. ██████