Closet monster

You are about to go to sleep. You hop in bed and look at the ceiling. You close your eyes, about to go to sleep, but then you hear your closet door creaking open. You get out of bed and open the closet door. You see a tall, black figure with black horns and white eyes. It looks down at you. You notice it’s long, dark claws. It speaks in a demonic voice. "One thousand years I haven’t been caught by you mortals. I’ve hidden from soldiers, royalty, even. But, a simple child… caught me."