Per 
Item #: SCP-XXXX
Object Class: Safe Euclid
Special Containment Procedures: SCP-XXXX is to be held up by the tip in a glass box that is constantly supplied with fresh oxygen and ventilated to the site's local air filtering unit. The box is kept in an oxygen-deprived room that is only supplied with oxygen during testing or routine object checks. Glass box is required for oxygen deprivation tests.
Description: SCP-XXXX takes the appearance of a fine tip Staedtler blue pen, 14 centimetres in length. After standard pre-containment tests, scans show that SCP-XXXX possesses some major organs. SCP-XXXX contains a brain, which would most likely only contain basic muscle memory and survival skills; a heart; lungs; and blood vessels leading to the ink supply and other unidentified 'organs'. On the exterior of SCP-XXXX is an abundance of air holes that take in oxygen for the respiratory system. The pen clip, tip, and button do not exhibit these air holes.
SCP-XXXX is harmless unless touched by any living being. When SCP-XXXX is touched or held by another living organism its air holes retract and it starts to extract oxygenated blood of the organism and dispose of the deoxygenated blood back into the organism. They will quickly lose control of the limb touching SCP-XXXX and can go into cardiac arrest of not forcefully removed from SCP-XXXX. During testing, oxygen is either deprived from the box and all entrants wear on-body oxygen supplies to make SCP-XXXX dependent on the oxygen it gets from organisms, or oxygen is supplied to the room and the box, then testing continues normally. If SCP-XXXX is deprived of oxygen for 10 minutes it will start breathing at 1/100th of the time it was before. Research shows it can last in this state for approximately 17 hours before symptoms of arrhythmia show.
All victims of SCP-XXXX's blood extraction are to be supplied with electric current by defibrillation if necessary and then taken to the medical unit to be set on blood and fluid delivery system for a minimum of 14 days or until their fluid and blood amount have regulated.
Origins: SCP-XXXX was first discovered when a marker in a shipment of pens made the students at ██ ███████████ High School "act differently". No students died as they were all placed in professional medical care. It was covered up by the Foundation and with the help of US government agencies as an accidental chemical spill into the pen's dye. All involved signed legal papers to not sue 'the pen factory'. SCP-XXXX was soon after taken into Foundation examination labs and turn placed into the appropriate containment facilities.
Addendum SCP-XXXX-A
Test Log
Reference #: 0002
Participants: Common Field Mouse
Procedure: Food is to be placed on SCP-XXXX's button. The mouse should try to get the did and rub by the air holes.
Results: The mouse, tried to climb SCP-XXXX, and in doing so made the air holes retract. SCP-XXXX started extracting blood from the mouse, and due to the mouse's size, it died in 3 seconds.
Addendum SCP-XXXX-B
Test Log
Reference #: 0015
Participants: D-6937
Procedure D-Class to enter containment with oxygen supplies in both SCP-XXXX's inner containment and the exterior containment. D-Class to touch SCP-XXXX with the back of his hand and retract after five seconds.
Results: Oxygen is supplied to exterior containment D-Class held a hand onto SCP-XXXX for 7 seconds and fell to the floor. Was rushed to medical unit and examined. No electrical shock required.
Addendum SCP-XXXX-C
Test Log
Reference #: 0023
Participants: D-4921
Procedure: D-Class to enter containment with on-body oxygen supply. Oxygen to SCP-XXXX's inner containment will stop. According to previous tests, SCP-XXXX will become dependent on another living being's oxygen. D-Class to grip, firmly, SCP-XXXX and hold the position for as long as possible.
Results: Oxygen supply is stopped from SCP-XXXX's interior containment and its air holes retract. D-Class grips SCP-XXXX for 12 seconds before losing control of their arm due to oxygen deficiency. D-Class' arm limps and is still and is still resting on SCP-XXXX. After realising what had happened, security guards rushed in and forced out of the containment chamber. D-Class required defibrillation and was in constant medical care for 18 days.
Addendum SCP-XXXX-D
Examination has shown that each of SCP-XXXX's air holes has its own trachea leading to one major trachea. Attempts to communicate with SCP-XXXX have returned negative. It is unknown if SCP-XXXX has a means of communication such as a larynx. But there is a growth in one of its minor tracheas. Further testing will show if this is intentional growth. Even of SCP-XXXX could 'talk', to hear a sound of such small amplitude would be impossible with the human ear. An extremely responsive microphone would have to be designed, though it would have to be the size of roughly a few air holes.
