Horn of Bicorn is an ingredient used in potion-making.
Horn of Bicorn is used in the following potions :
- Polyjuice Potion (Part 2)
- On the shelf in the back of Snape's Office in Book 2, Chapter 5, Moment 3. Before you investigate the shelf, you have to make a successful Swelling Solution, then Horn of Bicorn and Skin of Boomslang show up.
- Horn of Bicorn on the Harry Potter Wiki