In the Shadow of the Undercroft – Hogwarts Legacy Quest

In this walkthrough of the Main Story quest “In the Shadow of the Undercroft”, we’ll guide you as Sebastian shares a sweet new spell, and you share some secrets in return.

  • Quest Type: Main Story
  • Location: Astronomy Tower, Hogwarts Castle (map)
  • Requirements
  • Rewards

Sebastian is waiting for you near the Astronomy wing — your closest Floo Flame will likely be the Defense Against the Dark Arts Classroom, so use the closest fast travel point, then continue to your meeting spot (press button xbox dpad upif you need guidance from your compass). If you don’t see Sebastian, try looking away from the meeting spot, as he will sometimes not load in while you’re looking at where he’s supposed to spawn. Once you find him, speak with him by pressing playstation square button/button xbox x v2

When your conversation ends, follow Sebastian, and he’ll lead you to a strange looking clock. Walk up to it and hold playstation square button/button xbox x v2 to enter the Undercroft.

entering the undercroft in the shadow of the hogwarts legacy walkthrough

After a brief cutscene, you’ll find yourself in a large chamber. Sebastian will chat a bit — once he falls quiet, your objective will change to “Talk to Sebastian”, at which point that’s what you’ll need to do: walk up to him and press playstation square button/button xbox x v2. After another conversation, he’ll teach you Confringo. The sharp turns of the Z shape can make this minigame tricky, but you’re an accomplished spell caster by now! Don’t forget to look ahead at the required buttons before starting the casting attempt.

Open your Spell Menu with button xbox dpad right and put Confringo into your Spell Diamond. Then you’ll need to cast it on the three candelabras in the room — one in the northwestern corner, one to the east, and one to the south. The spell has good range, but if you’re having trouble hitting one of the candelabras, hold playstation l2 button to aim carefully before casting Confringo.

candelabras to hit with confringo in the shadow of the underdark sebastian quest hogwarts legacy walkthrough
One of the three candelabras you need to destroy with Confringo

After you’ve destroyed all three candelabras, go back to Sebastian and press playstation square button/button xbox x v2 to speak with him once more. He’ll get you talking about your Ancient Magic abilities, and then it’ll be time to go.

Head to the door you came in, in the northeastern corner of the chamber, and hold playstation square button/button xbox x v2 to leave the Undercroft. Upon exiting, you’ll be accosted by Ominis Gaunt. When your conversation with him ends, you’ll have completed the quest! Next up, The Map Chamber.

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Unabashed FromSoftware fanboy still learning to take his time with games (and everything else, really). The time he doesn't spend on games is spent on music, books, or occasionally going outside.

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