Lacewing Flies are an ingredient used for potion-making.
Lacewing Flies are used in the following potions:
- Polyjuice Potion (Part 1 and Part 2)
- Apothecary : 6 for 2 Galleons
- Can be found on the floor to the right of the toilet in Harry Potter and the Chamber of Secrets, Chapter 12, Moment 2.
- On the floor by Dumbledore's foot in Harry Potter and the Goblet of Fire, Chapter 35, Moment 1.