In the sixth-floor boys' bathroom, Draco Malfoy was injured by Harry Potter during a heated confrontation. Harry, believing Draco was about to use the Unforgivable Curse, "Sectumsempra", reacted in self-defense and used the same curse, severing Malfoy's arm. This incident occurred in the Half-Blood Prince book.
Draco Malfoy was injured in the sixth-floor boys' bathroom when he and Harry Potter engaged in a duel.
After using the "Sectumsempra" curse, Harry nearly killed Draco, resulting in severe injuries.
*The altercation occurred after Harry discovered Draco in the bathroom, believing him to be up to no good.
Draco was taken to the Hospital Wing by Snape, who healed him and later informed him that his father had been "summoned". This experience deeply impacted Draco, contributing to his later internal struggles with his loyalties and actions.
