Ultra-realistic 3D render of a magical purple potion in a glass vial. The vial is ornate, with silver filigree wrapping around the neck, and glowing faintly from within. The potion itself is swirling with luminous violet and magenta hues, slightly translucent, with tiny sparkling particles suspended in the liquid. Soft ambient lighting reflects off the glass surface. Background is dark and mystical, with subtle fog or magical runes faintly visible