Transformation Potions

Tranformation Potions are magic potions featured on ABC's Once Upon a Time and Once Upon a Time in Wonderland. They first appear in the fifth episode of the first season.

Ingredients

 * A gold thread poured with an unknown liquid.
 * Blood from the impersonated being.

Trivia

 * Transformation Potions are regarded as poisons.
 * An antidote can be used to prevent the transformation from happening.