Per 
Name: SCP-4211
Class:Euclid Neutralized
Containment Procedures: It must be kept in a glass jar with an iron lid . It must be kept inside at all times unless testing. It is extremely dangerous to researchers. It can pass through most materials.
Update: as of ██/██/██, A sprinkler malfunction has neutralized the gas
Description: SCP-4219 is an entity in the form of gas. It was discovered on ██/██/██ when Dr. M███████ took an exploration team to the deserted Russian town known as [DATA EXPUNGED] , after being tipped off by an agent. They went into the mine and suddenly felt a cold chill. At the bottom they found a Russian bunker. Used in the cold war, it was once a laboratory used by [CLASSIFIED]. In the lab was a warhead that seemed to have an opening. An MFT opened it and the gas leaked out of it. The gas was taken into SCP custody.
Effects: This gas is known to have some severe effect on the brain if inhaled. Tests have been done on this gas and most subjects came out with the same result, such as Mr. ██████
Mr. ██████ was 29 year old con who embezzled millions of money. He took a intelligence quotient test of questions compiled by the SCP Foundation, and scored a 110. After the subject inhaled a small 1 gram of the gas, and waited 10 minutes, the subject took the exact same test again and the subjects intelligence quotient was down by 50%. Every single subject’s IQ was lowered by 50%. Every subject reported a mild ringing noise for the first 3 to 5 minutes after inhaling the gas.
Addendum 1:
This is a transcript of there conversation.
Before the gas
[REDACTED]:How are you feeling?
Mr. ██████: fine.
[REDACTED]: Would you please describe what you see here holds a rorschach test
Mr. ██████: I see two bears
[REDACTED]: Good what about here?
Mr. ██████: a house.
[REDACTED]: Ok last one, here?
Mr. ██████: a dog
[REDACTED]: Ok we will need you to take an iq and physical test.
After the gas
[REDACTED]: How are you feeling?
Mr. ██████: gud
[REDACTED]: what do you see here
Mr. ██████: I see a flower. Gimme the picture. Grabs at the picture
[REDACTED]: No, this is owned by the sc-
Mr. ██████: REEEEEEEEEEEEEEEE
Mr. ██████ attacked [REDACTED] and had to be detained. Later after that he had been more calm. We asked him to take an iq test and physical. He scored a 55.
