Ursula's Magic Potion is a source of magic contained in a light purple colored glass bottle, which can fulfil any of the user's true desires. It was created by Ursula the sea witch, but later makes its way to Morgana where she stores it in her ice cave to save for a special occasion.
Role in the film[]
After successfully luring Melody into her lair, Morgana convinces her that the only thing that will make her happy is to become her true self - a mermaid. Melody's longing to be a part of their world grows and so she will do anything to become one herself. Morgana's first part of her plan is to trick Melody into believing she is actually helping her, therefore using the remains of a potion that was hidden in the back of her storage. It was said that it previously belonged to her sister, who was a highly skilled sea witch and only one drop was left so she kept it for an emergency.
Morgana presents her findings with Melody and pours the remains onto her feet which transforms the young girl into an red-tailed mermaid. Full of excitement, Melody swims and leaps to Morgana to give her a hug; however, Morgana later lies to her and explains deceitfully that the magic won't last forever, and that Melody must bring her the trident to remain a mermaid forever.