The Hogwarts Legacy is a collection of small and big puzzles that players must solve in order to get through missions. There are certain puzzles that aren't required to solve, but which can earn you some interesting rewards and XP. Here's a guide on how to solve the Hogwarts Legacy's mystery of the locked House Chest and floating keys.
How to Unlock the Hogwarts Legacy House Chest
Nellie Oggspire, a student in the Astronomy Wing near the Transfiguration Courtyard, will assign you the task of collecting House tokens. A special uniform you may equip will be available if you collect and deposit 16 House tokens.
Daedalian Keys are scattered across Hogwarts Castle at various points. If you pass one of these shiny objects, they'll make a jingling noise and start flying around you, eventually leading you to a nearby House Cabinet if you follow their trail. Once the Daedalian Key is in place, you'll receive a House Token from the cabinet. Collect all 16 House Tokens and deposit them in your dormitory vault.
More information on Hogwarts Legacy can be found on Pro Game Guides. In the meantime, check out our article on How to Get Crucio (Unforgivable Curse) in Hogwarts Legacy.