By A Mystery Man Writer
The horn of a unicorn had magical properties that made it a useful ingredient in potions, such as the Antidote to Common Poisons. In classical myths, unicorn horns had purification properties which were used to dissolve poisons. This could be why it was used in the Antidote to Common Poisons. There was a lively Muggle trade in unicorn horn, which they believed to have medicinal properties. However, most of these supposed horns were fake, and the few real ones that did pass into Muggle possession
Unicorns, Pottermore Wiki
Unicorn horn, Harry Potter Wiki
Luna Lovegood – Harry Potter Lexicon
Horned Serpent, Harry Potter Wiki
Harry Potter: Hagrid as a parental figure.
Harry Potter and the Lady of the Unicorn
Graphorn at the Magical Creatures Reserve
Unicorn, The Harry Potter Compendium
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Unicorn Horn - SD Studios LTD