Per 
Item #: SCP-XXXX
Object Class: Safe
Special Containment Procedures: SCP-XXXX is to be kept in a meter wide glass cube, inside a 4 meter cubical containment room. The front cover of the cube is to always be closed unless approved by at least 2 Level 3 Personnel. The cover is remote-activated, and is controlled by Level 3 personnel in the viewing chamber. Cover is to never be opened while Containment Chamber doors are open, and doors are to not be opened while cover is open or SCP-XXXX is currently removed from the glass cube. SCP-XXXX is to never leave the containment chamber unless advised by at least 1 Level 5 Personnel.
Description: SCP-XXXX is a 6 centimeter long snake skull of unknown origin, but scientists believe the snake is a type of python. There is no remnant of the backbone besides a mark of a cut on the back of SCP-XXXX. Method of removing backbone is not yet known, but the mark implies brute force. SCP-XXXX has no known age besides having slight decay marks and being older than [EXPUNGED] years old from being discovered on ██-██-████ in a dig-site in Africa.
SCP-XXXX can inject venom known as XXXX-HV into anything touching the tip of any of the fangs.
SCP-XXXX can inject up to 15 mm at once, before stopping to regenerate venom. 1 mm of venom can regenerate in about 35 seconds. Any living creature after about 2 minutes of being injected by venom will start to hallucinate [EXPUNGED] snakes. If a subject is injected with venom, and that venom reaches the blood stream, the venom will [EXPUNGED] the bloodstream, causing numbness and the subject's eventual death. Any of the [EXPUNGED] in the subject's body will act as venom produced from SCP-XXXX.
Addendum:
Test-XXXX-D-8956 - ██-██-████
Subject: D-8956
Scientist: Dr. █████
Foreword: Subject D-956 describing affects of venom after being injected.
<Begin Log, 1 minute after injected>
Scientist: So how do you feel, D-8956?
Subject: The finger where you poked me with that tooth is feeling numb, but other than that I feel fine
<30 seconds pass>
Scientist: Anything weird happening?
Subject: My entire hand is going numb, I can't really feel it anymore. The numbness is moving up my arm. What is happening? You can heal this right?
Scientist: Describe this numbness.
Subject: I CAN'T MOVE MY ARM! <Screaming> Did you NOT just see that snake! IT ATTACKED ME!
Scientist: What did the snake look like?
Subject: Why do you care… <Subject falls unconscious>
<End Log>
Closing Statement: Subject died within 2 minutes. An Autopsy revealed [EXPUNGED].
