Overview:

Nerida Roberts asks you to retrieve a Mermish artifact from a nearby underwater cave.

Quest Requirements:

• Main Quest Completion: Percival Rackham’s Trial

Quest Steps:

1. Talk to Nerida Roberts:

• Find Nerida Roberts sitting by the Boathouse docks near the Great Hall.

• She will ask you to recover an artifact from an underwater cave.

2. Find the Leaky Caves:

• Follow the quest marker to a nearby cave entrance.

• Dive into the water to enter the cave.

3. Find and Collect the Mermish Artifact:
Inside the cave, you’ll encounter a locked door that requires three moths to open.

• Two of the moths are trapped in spider webs.

  • Cast Incendio to free them.

  • Use Lumos to guide each moth to the door.

• The third moth is directly across from the locked door.

  • Use Lumos to lead it to the door.

Once all three moths are placed, the door will open, revealing a chest.

• Open the chest to collect the Mermish artifact.

4. Return to Nerida:

• Head back to Nerida Roberts and give her the artifact to complete the quest.

Rewards:

• Appearances

• 180 XP

This completes the ‘Mer-Ky’ Depths side quest in Hogwarts Legacy.
For all other side quests and main quests, check out the complete Hogwarts Legacy walkthrough.