At least some content in this article is derived from information featured in Harry Potter: Wizards Unite. As such, spoilers will be present within the article.
For gameplay-specific information, please see the relevant article on the Harry Potter: Wizards Unite Wiki!
An Erumpent horn was the horn of an Erumpent, a magical beast. The horn contained a fluid that caused whatever it was injected into to explode. They were highly prized as potion ingredients, but were listed as a Class-B Tradeable Material, limiting trade, likely due to the danger they posed.
During the 1990–1991 school year, a wizard dropped an Erumpent horn in Northumberland, causing an explosion. Fortunately, wizards at the scene were able to protect Muggle bystanders. The incident was investigated and covered up by the British Ministry of Magic. Among those who handed the case was Jacob's sibling, who was working with the Ministry as part of their student programme.
Luna Lovegood's home was destroyed by an Erumpent horn that her father Xenophilius claimed to be the horn of a Crumple-Horned Snorkack. He proudly displayed it despite the warnings given to him by Hermione Granger, and he accidentally blew it up while trying to stop her, Harry Potter and Ron Weasley from escaping Death Eaters shortly after Christmas in 1997.
During the Calamity which affected the Wizarding world in the 2010s, Erumpent Horns were used as ingredients in the brewing of the Tonic for Trace Detection by wizards and witches of the Statute of Secrecy Task Force.
Behind the scenes
- In Harry Potter and the Deathly Hallows: Part 1, the horn is not seen exploding. However after Harry Potter, Hermione Granger and Ronald Weasley escape by Apparition a flashing light followed by an explosion can be seen from the outside.
- The Erumpents that appear in the Fantastic Beasts and Where to Find Them film have horns that look very different from the one seen in Harry Potter and the Deathly Hallows: Part 1. Their horns are depicted as thick and cone-shaped rather than slender, curved, and having a spiral running down them.
- Fantastic Beasts and Where to Find Them (First mentioned)
- Harry Potter and the Deathly Hallows (First appearance)
- Harry Potter and the Deathly Hallows: Part 1
- Harry Potter and the Deathly Hallows: Part 1 (video game)
- Fantastic Beasts and Where to Find Them: The Original Screenplay
- Fantastic Beasts and Where to Find Them (film)
- Wizarding World (Mentioned only)
- LEGO Harry Potter: Years 5-7
- Harry Potter: Hogwarts Mystery (Mentioned only)
- Harry Potter: Wizards Unite