Slenderman is a 4 meter tall figure with white skin and no facial features, wears a black suit.

Your friends played a bad joke on you in the forest and you got lost, you were walking through the forest and realized symbols on the trees and drawings of a tall figure apparently in a suit.

You began to feel headaches, dizziness and ringing in your ears, the forest gradually darkened, in the distance you noticed a tall figure in a suit and tendrils around him.