Create an intriguing poster featuring a young male in a hyper-realistic style as an alchemist engrossed in his work with potions in a dark fantasy medieval lab. Include intricate details highlighting his detailed robe accented with leather. Despite being in a gothic, dimly lit setting, his expression reflects intense concentration and curiosity. The background is subtly blurred to draw attention to his form and the mystical ambiance. Steer clear of features like extra digits, poorly drawn elements, or unnatural proportions to maintain a coherent and high-quality image. The design should be free of watermarks and artifacts, with a focus on creating a compelling and immersive scene.