Sometimes you go looking for adventure, and other times adventure is handed to you via a map found in ancient ruins. There are a lot of side quests in Hogwarts Legacy that you can find by accident while you are exploring the southern portion of the map. It will teach you how to complete The Hippogriff Marks the Spot in Hogwarts Legacy.
In Hogwarts Legacy, the Hippogriff marks the spot.
After escaping the goblin encampment that prevents you from entering the Poidsea Coast, head south to Poidsea Castle, which has been overrun by dark wizards, where you can find the map on the southern side of the castle. This map includes a hippogriff statue and some remains.
Follow this map south to the massive body of water that surrounds the West Manor Keep Floo Flame fast travel point. Once there, locate the entrance on the side of the ruins that leads inside the cliffside. This will take you to Henrietta's Hideaway.
Inside Henrietta's Hideaway, you will find a room with two plates on the ground. The other plate has a freezing cube on it. Light the bowl at the base of the statue's bowl, then move it over to the plate with the fire symbol on it. This will open the door.
How to Get the Kelpie Robe in Hogwarts Legacy
Go inside the hideaway and demolish the Ashwinders in the room with the hippogriff statue. Once they have all been defeated, turn your attention to the statue. Check out the flame pattern on the map. Use a fire spell and the Glacius spell to ignite and extinguish the fire bowls around the statue to match the pattern.
A wall behind the hippogriff statue will open up, revealing a treasure chest when the fires are in the correct order. Interact with the treasure chest to complete the quest.