Per 
Item #: SCP-XXXX
Object Class: Keter
Special Containment Procedures:
Description: SCP-XXXX-1 describes a series of small packages shipped through local postage systems. SCP-XXXX-1 instances resemble small brightly colored envelops addressed to the recipient in lavish calligraphy. The recipients of SCP-XXXX-1 tend to be between the ages of 16 and 25, possess extroverted behavior, and live risky lifestyles. SCP-XXXX-1 contains a small card that informs the reader that they are invited to a party.1 Reading and comprehending SCP-XXXX-1's message in its entirety triggers a cognitohazard that causes the reader to feel the irresistible urge to go to SCP-XXXX-2.
SCP-XXXX-2 is a large abandoned house located in ████████, ██████. SCP-XXXX-2 appears to have been created some time in in the 1990's. Despite seemingly never been occupied, SCP-XXXX-2 is in remarkably good condition. When observed by a subject affected by SCP-XXXX-1, the subject will see colorful light coming out of SCP-XXXX-2's windows, accompanied by loud talking and laughing coming from within. A subject affected by SCP-XXXX-1 entering SCP-XXXX-2 in any way will instead be transported through a wormhole. This wormhole is invisible, and can only be accessed by subjects affected by SCP-XXXX-1. Entering this wormhole takes the subject to a small pocket dimension designated SCP-XXXX-3.
SCP-XXXX-3 resembles the inside of SCP-XXXX-2 to a non effected subject, with a few notable differences. SCP-XXXX-3 is populated by 15-30 humanoid entities designated SCP-XXXX-4. SCP-XXXX-3 is decorated with various party decorations, including balloons and streamers, and has other various foods and activities available for the subject and and any SCP-XXXX-4 instances. The party will begin with no noticeable anomalous behavior, but over a course of time dependent on the subject,2 the wormhole used to enter SCP-XXXX-3 will close.
Addendum:
