Per 
SCP - XXXX after the night. Photographer unknown.
Item #: SCP-XXXX
Object Class: Eucild
Special Containment Procedures: SCP - XXXX is kept in the north of ██████, Site 631 Site 19. SCP - XXXX is to monitored at all times. SCP - XXXX can't be contained due to it's nature but it's monitored. No fewer than 2 armed guards next or montioring SCP - XXXX from 20 meters. Unauthorized personnel at SCP - XXXX will be terminated. Level 3 personnel are to be at SCP - XXXX if accepted by O5 - ██. Testing are to be no longer than 3 hours. No physical contact is allowed with SCP -XXXX.
Description: SCP - XXXX is a sentient thunderstorm, made of some kind of substance. The sentient thunderstorms appears when any humans life form of any kind inside the barrier. It can dectect if the life form sentient, if the life form is sentient it will execute it and destroy it. SCP - XXXX height is unknown. SCP - XXXX is capable of speech and is extremely intelligent. SCP - XXXX will electrocute a specfic person and become instances of SCP - XXXX -2. The orgin of the humanoid is unknown and when telling it, it will become angered and attempt to kill the person who angered it. SCP - XXXX is immortal and can move quickly as fast 105 mph. When breached it will find a way out of the planet, but numerous times have failed. SCP - XXXX is able to turn into a human but prefers his current form. SCP - XXXX is controlled by SCP - XXXX - 2 and is made of a black substance similar to tard.
Addendum: SCP - XXXX was discovered after numerous reports of missing people. 195 people reported missing in ██████ and the foundation was contacted on 12██/██.