The line comes from Harry Potter and the Half-Blood Prince, released in 2009, during the confrontation after Harry casts Sectumsempra. Snape reveals he invented those spells as a student, signing his work as the Half Blood Prince. The Spanish dubbed version spread widely in Latin American and Spanish meme pages, where the formal phrasing became a reusable accusation. Fans still quote it whenever someone is beaten with their own creation, strategy, or idea, keeping the scene alive far beyond the film.