How To Open The Treasure Vault In The Lake In Hogwarts Legacy

Before you can get to the treasure vault, there are some preparations you need to make. First, make sure you have the proper equipment for diving underwater, such as a waterproof charms kit and a breathable air potion if you wish. You'll also need a pull spell to activate the switch to open the stone wall. Finally, collect any items you think you may need for your adventure, such as healing potions, food, and other useful items.

Once you're ready, it's time to explore the lake and find the marker that will lead you to the treasure vault. Swim around the lake until you find the marker that has a swirl around it. Swim down and through the swirl and you'll find yourself inside a cave. Look up to the right and you'll see a switch you can pull with your pull spell. Activate the switch to open the wall and access the two chests and whatever else awaits. 

Once you've opened the wall, you can explore the treasure vault and collect the two chests. Inside, you'll find a variety of magical items, such as powerful spells, rare ingredients, and unique artifacts. You never know what else may be hidden in the vault; look around and explore every nook and cranny to uncover all the secrets within.