SlenderMan
He stopped as he heard a loud roar that came from the bushes ahead. He tilted his head and out came a bloody snarling beast. Its flesh still bubbling from the acid that had been poured on it. It hissed and took a step towards them. SlenderMan picked up a piece of paper that had fallen. "Hello there... what is your name beast?" He muttered as he read the paper on the beast aloud.
"Name is unknown, item is known as SCP - 682. Thought to be a genderless creature is said to be male. Item SCP - 682 is highly dangerous. Is to be destroyed as soon as possible, yet SCP - 682 is nearly impossible to kill. SCP - 682 is classified as a mutant/Monster species. Is known to speak and comprehend speech, become incredibly powerful when enraged, walk on walls and ceiling and even stand on two legs. SCP - 682 is known to have a hatred for all life forms and Is highly deadly. History of the creature is unknown. No said family or kin. SCP - 682 is to be killed on sight..." SlenderMan finished and looked up at the bloody creature. It let out a bloody roar and locked its eyes on Lilith.
(Roar:
https://www.youtube.com/watch?v=6auOVqTKkvc
(Image not mine. Welcome my big beauty! SCP -682!!!

)