From the hidden corridor of Herbology to the restricted section of the Library itself, Hogwarts Legacy is packed with dangerous and sinister places. This quest from Fig. starts you off by snooping into the library's restricted Section. Your friend Sebastian Sallow will teach you a spell to assist you in completing this risky task: Disillusionment.
The Disillusion spell allows you to see the chests with eyes and acts like Harry Potter's invisible cloak— you won't be seen as long as it's active. However, this quest has a sneaky minigame.
How do I get to the Hogwarts Legacy restricted section?
The Prefects should not be staring at you, and the other two should be concentrating on you. I'm not suggesting using Unforgivable Curses, at least not yet. You'll need to grab the key from the Librarian's desk.
Related: What is Hogwarts Legacy's maximum level?
After a simple stealth phase, you'll be inside the Restricted Section. Remember to grab a chest in the upper floor. Now comes the next important step. Prefects and librarians are nothing next to ghosts. First, hold the map around to determine where to go when the next ghost arrives.
Continue through the restricted sections until you reach an eyeball chest for you to open. Once the clown/jester has died, you will need to navigate your way through the Athenaeum. Keep going until you activate the ancient magic.
In Hogwarts Legacy, how do I get to the Athenaeum?
Look to your left to grab a chest as you enter the portal. Only then will you reach a ravine. A bridge will emerge if you land several basic attacks on the orb in front of you.
On the other side, you'll have to battle several Pensive Paladins. Keep going until you uncover a fascinating book. A story cinematic will be triggered, and you'll return to the restricted library section with Sebastian. After seeing one more cinematic, the quest will be completed.