A dark, humanoid creature shadow with indistinct, blurry edges suddenly appears at the right top corner and starts slowly moving as if it was going downstairs viewed from the side, moving diagonally from right to left down. The shadow begins to slowly descend as if going downstairs with unsettling, deliberate movements. There are no real stairs. The lighting in the scene is warm and muted, casting faint reflections on the walls and steps. The shadow's motion is slightly distorted, as though shifting between dimensions, creating a sense of unease. The background must be transparent. The moving shadow is the only object that must be shown on transparent background.