Doorkeleton is a very anonymous creature. It was discovered in 1997.
Doorkeleton seems to be a tall, rotten skeleton and seems to suffer from insufficient nutrition. What type of creature it is, it's currently unknown, but his body is similar to a skeleton.
This thing lives in abandoned places, changing the location every year. It hides in certain rooms of the place, waiting to spot a human. The hearing ability of Doorkeleton is extremely advanced, so he can easily understand if a human comes in. Once spotted, he will wait for the human to open the door where it hides. When the human opens that door, he will quickly attack the human and will eat it if it dies. It has been confirmed that the hunting reason is nutrition, because the creature only eats meat.