As you explore the different rooms and hallways in Hogwarts Legacy, you will often come across eye-chests containing valuable items that can be used to significantly improve your character. These eye-chests can be found in every nook and corner of the game and one such location is the Library Annexe area in Hogwarts Castle.
This guide will tell you where to find the one-eyed chest in the Library Annexe area of the game

In order to find the one-eyed chest, you will need to head over to the restricted section of the library which you need to visit during the “Secrets of the Restricted Section” main quest. This quest will be available on the third day of the campaign and you can always come back to the restricted area later if you miss any treasure.

To find the chest, travel to the Library Floo Flame where you need to go straight and then turn right to enter the restricted section of the Library. Open the Iron Door and then head down the staircase.

In the Restricted Section, follow the passage on your left and then use the staircase to go down a level. The path is mostly linear so you won’t have trouble navigating through it.
Once you reach there, make your way past the first two rooms and you will find the one-eyed chest next to the bookshelf in the third room.
You will need a key to unlock this chest which can be found on the opposite side of the back corner. Do note that the eye on the chest will follow your every movement and will be startled when you are too close to it.
Cast the Disillusionment Charm when you are not in proximity to the chest and the treasure will be all yours.
These chests often contain random loot such as gear, collection or other items however you will always receive 500 Gold from them which makes them a good source of additional revenue.
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