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A magical potion illustrated in the official Dungeons & Dragons fantasy art style, resembling a detailed magic item from a 5e sourcebook. The potion is contained in an elongated glass bottle with intricate arcane glasswork shaped like stylized feathers pointing upward along the neck and shoulders of the vial. The glass is tinted amber and soft white, expertly crafted, enclosing a translucent brown liquid with faint swirling motion. Subtle transmutation magic glows within, with delicate runic sigils and a restrained magical aura typical of D&D item illustrations. Neutral parchment-toned background, clean composition, realistic fantasy proportions, painterly yet precise rendering, warm lighting, high detail, classic tabletop RPG artifact presentation. Potion of Avian Transformation.