Hogwarts Legacy will periodically add Side Quests to your map. These can be completed at your leisure – to an extent. Certain Side Quests can only be completed at certain times during the year, so it’s usually best to complete them as early as possible. Thankfully there is rarely more than a couple of Side Quests spawning at once.
One of the earlier Side Quests you can complete is ‘Cache In The Castle’ which can be started by talking to the mystery-loving Arthur Plummly. He has some riddles that need solving, and treasure sure awaits those who crack them. Rather uniquely, however, you won’t have any waymarkers, and you won’t have access to your Guiding Charm. That’s where this guide comes in.
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The first clue to finding the treasure is tracking down the Rhinoceros Skeleton. Now, this quest can be rather difficult if you have skipped out on exploring Hogwarts, but thankfully, all of the clues are pretty close together and in a logical progression. From Arthur Plummly’s location, all you have to do is head downstairs.
Heading down the nearby staircase (the one you climbed to get to Arthur in the first place), will have you pottering past various pieces of art – including Skeletons. The Rhinoceros Skeleton is unmissable. Simply keep on heading downstairs and you will eventually walk right into it. This will trigger a response from your character, and reveal the next clue.
The Dragon Fountain is a place you may remember from earlier in the game. You have actually spent some time here during one of your Assignments (and one other Side Quest). It is in the Transfiguration Courtyard, and this is very close to the Rhinoceros
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