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Magic souls are the spirits of various wizards, sorceresses and alchemists. They were captured by the Duchess for their powers.
Each soul is a magic practitioner who has mastered or created a certain spell like the spells of fire, flight, mind-control, sandbag summoning and sleepy rabbit conjuring. They are used by the Duchess to perform feats of magic, until her magic was restored.
They are bottles of various shapes. The souls are glittering balls of light in different colors like blue, green, purple, yellow and red. Their glow intensifies when they speak.