Per 
Object: SCP-5038 aka The Shadow Demon
Object Class: Euclid
Special Containment Procedures: It is to be kept in a 20 m x 15 m x 22 m steel case and it wears a shock collar set to 500 volts of electricity, enough to incapacitate it. It is given a raw cow once every 5 days to be kept alive for further research. No less than 15 agents are allowed to leave this creature alone nor are they allowed to interact with or speak to the creature, doing so will result in immediate termination.
Description: It is a 6 ft. 7 in tall creature when standing upright, it has dark skin near jet black and it has the bite force stronger than that of an alligator. When it hunts for pray it reveals its enormous wings and can fly to as fast as 95 km/h. When provoked it can and will turn invisible killing any attackers in less than a second. It was found during a search in Mexico due to a dramatic loss of Cattle and Sheep, while searching for the thing it took away 2-3 Agents and started screeching after the attack. There were 5 (five) casualties and 6 (six) injuries during the search. It appears as though the subject does not age nor does it get affected by any of the SCP's in the facility. This SCP shows no sign of high intelligence although it does respond to some words said aloud. It is unknown whether this SCP can reproduce or not. This SCP can see to about 25 (twenty five) miles far and smell 3 times farther. SCP-5038 CANNOT be allowed smell nor see anything past its containment chamber. There are not many of its kind, and it has a large appetite for human flesh, so be weary around this thing. Very aggressive but tries to stay away from humans. Has an interest in hamburgers though.
Origin: It is said that SCP-5038 aka Shadow Demon had originated in the early 1400's, when people believed that magic was real and that entities such as the Oprinichki existed. "It was long ago when a boy named Nikolai was born into the royal family of England, London. His father was a powerful man with the might and will of a country, and his mother no more than a young and beautiful woman who once lived on the streets. He was a lonely boy and did not have need for any friends or love, and he did not want to eat anything that was given to him but raw meat. At times when he was alone he wanted to commit suicide, but all of his attempts failed. One night he decided to go out into the "River of the Dead" and swim there, and that is exactly what he did. When he stepped into the river he noticed something strange happen to him, he began to see in the dark, his hands grew sharp talons, and his back started to grow wings. After a few minutes the boy screamed in pain and as fast as he screamed, his entire body changed. Black skin, stronger jaws, and loss for words, he was no longer a boy, he was a beast. For weeks now he has been eating cattle from the villages and have been seen eating the townspeople. When the king discovered about his son, he immediately knew what he needed to do but every time he tried to kill it he failed so he kept it locked away in a place where no one would go".
Termination Attempts: All termination attempts have resulted in major loss of staff, or death of other SCP's trying to terminate the creature. [total termination attempts 93 ( ninety-three )]
Additional notes: After a few years of captivity, it has developed speech. It has been able to create sentences that make sense and is very persuasive. It has also been able to develop a proper human face. At night the true beast comes out to fill the silence of site-17, in the day it looks like a normal human being,but DON'T BE FOOLED.
[AUDIO LOG] #1:
Dr. Quarilen: So, after a week of observation what have we learned about this creature, hmm. Go on I am waiting for an answer. Umm, you tell us what you have learned from it.
Dr. Ely: OK, over the previous days, I have learned it can shapeshift to a human-like form in the day, and back to demon at night.
Dr. Quarilen: Has anyone else learned anything, anything at all?
Agent Smith: Well, when I was patrolling the area I noticed something weird happen to me, suddenly I was eager to do something I did not like to do, the beast has strong persuasive abilities, allowing its victim to do what ever it pleases. 1 (one) time I saw my colleague patrol the area when he suddenly froze and went into the creatures cage. Soon after we found his corpse in the disposal bin.
Dr. Quarilen: Hmm, interesting. I will have to observe this creature myself when I am available. That is all I need for now. Go back to your duties, [ turns around ] why are you still here, I have dismissed you haven’t I now go, I have other matters to attend to.
[ END LOG ]
Incident #001: While Dr. Quarilen was observing the creature he noticed something, the creature knew where he was. For his safety he was assisted with 5 agents to protect him in case something bad happened, but before they were able to escort him out of the room all 5 agents were killed in the blink of an eye. The creature stared at the soul of Dr. Quarilen, but luckily for Dr. Quarilen it lost interest in him, and it told him “Know that if you come here again, you will be my dinner” and it left him alone. In shock Dr. Quarilen fainted and was escorted out of the room shortly after the incident.
[[ IDEAS ARE APPRECIATED, MORE STUFF ADDED LATER]]
