Per 
This scp is a keter class object
It looks like a normal house, 10 rooms, 2 bathrooms, one bedroom
But it holds a dark secret
at night personnel report seeing tall slender shadow people with long claws, zombies with a weird head
that looks like a face hugger from the movie alien
people go insane in 10 days
lots of people have died, death numbers are unknown but the estimate is 1032114 to 2293892
Dr John decided to run the first test in 4 years since the discovery, (discovered in 2016)
He tried to spend 5 days in the house, that night he was walk down the hall taking notes where he saw the shadow creature at the end of the hall, it began to run at him the lights turned off and then on but it was gone, he felt a long finger on his shoulder he turned around and saw nothing, that was his last second as he was found dead in the hallway, his back cut open and his organs gone.
SCP personnel jacob nilton; Said he picked up weird vibes by the hallway and the bathroom
Dr Leo went to run a test, He heard what jacob said so he went to the bathroom
in the mirror he saw a shadow creature, he ran out. later he comitted suicide, the SCP personnel
found his diary, the latest entry
August 13 2020:
after the test, I went home early, i went to bed I woke up were I saw that shadow monster, it came closer, and said "kill yourself, you will be free from me", then I woke, I kept having the same nightmare, if anyone is reading this I have already killed my self, I will join them
The SCP personnel were puzzled about what "i will join them" meant
And unsolved mystery.