During the In the Shadow of the Relic quest, Hogwarts Legacy players will have a chance to learn Avada Kedavra, which, for obvious reasons, is also known as the killing curse. As any serious Harry Potter fan should already know, Avada Kedavra is one of the wizarding world's three unforgivable curses; the other two being Imperio (the Imperius curse) and Crucio (the Cruciatus curse).