Black and white pencil illustration, no 3D or digital effects. A magical potion bottle drawn with fine pencil lines and detailed shading, like a hand-drawn sketch. Inside, a bubbly and living substance seems to swirl, with a few bubbles escaping from the neck. The style evokes a fantasy or alchemical atmosphere, mixing mystery and curiosity. Minimal background, no color, focusing attention on the bottle and the texture of the potion. See more