"That was far easier than I thought it would be. I needn't have learned about the 1637 Werewolf Code of Conduct or the uprising of Elfric the Eager."
Hermione Granger, on her History of Magic exams[src]

Elfric the Eager was an individual responsible for a revolt. His actions were taught in History of Magic a course at Hogwarts School of Witchcraft and Wizardry.

Behind the scenes

  • Elfric the Eager's species is not established, but since he was responsible for a revolt, and is covered in a History of Magic class, it is likely he was a Goblin. However, this has not yet been confirmed.