Do you guys know the SCP Foundation? :D They Secure (unknown stuff), Contain (these unknown stuff), and Protect (us) from the unknown :o
I feel like this challenge screams a lot about the unknown so I tried creating something that might come from the SCP Foundation universe ouo I've decided to create my own SCP description about it :B it's pretty long, just to warn you :3
Object Class: Euclid
Special Containment Procedures: SCP-XX6X is to be contained within an empty white standard containment cell. Personel or subjects entering the room should wear a one-way visored, all-white containment suit clear of any discoloration.
Description: SCP-XX6X appears to be a floating transparent key of unknown material. Subjects that can be "seen" by SCP-XX6X and make eye contact with it will have severe color disorientation until the subject can only perceive blue hues, then SCP-XX6X will absorb the blue hues from the subject's perspective and it will become opaque with the previously absorbed blue hues. When a subject closes his/her eyes during this state, he/she will see a golden version of SCP-XX6X. It is currently unknown where SCP-XX6X will fit in.
Recovery: SCP-XX6X was recovered in 6/XX/19XX, in XXXXla within a basement room located beneath what used to be a den for a cult that seemed engaged in sensual pleasures.