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Grand Mill Works
Bravely Second

Grand Mill Works

A complete walkthrough for Bravely Second's Grand Mill Works dungeon, including elevator switch locations, item finds, and strategies for defeating the Amphisbaena boss.

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A complete walkthrough for Bravely Second's Grand Mill Works dungeon, including elevator switch locations, item finds, and strategies for defeating the Amphisbaena boss.

Walkthrough
  1. 1
    Exit the Harena Sea Caves and travel north to Ancheim. Rest and resupply if needed.
  2. 2
    Enter the Grand Mill Works through the door left of the Magics store. Head north-west to enter the dungeon.
  3. 3
    Floor 2F: From the entrance, head north and take the stairs up.
  4. 4
    Floor 3F: Proceed east to the locked elevator. Head south and descend the stairs.
  5. 5
    Floor 2F: At the T-junction, head east and go up the stairs.
  6. 6
    Floor 3F: Head north to a lever on the left. Inspect it to disengage the first lock.
  7. 7
    Floor 2F: Return to the T-junction and head south. Take the westward path for a chest containing Zeus’s Wrath.
  8. 8
    Take the eastward path and go up the stairs.
  9. 9
    Floor 3F: Head west, ignoring the northward path for now, to pick up Roc Fillet. Follow the northward path.
  10. 10
    At the fork, head south for 800 pg.
  11. 11
    Return to the fork and head north. At the next fork, head north to stairs leading up.
  12. 12
    Upstairs: Open a chest for a Remedy. Return to the previous fork and head south, then down the stairs.
  13. 13
    Floor 2F: Head east, then south. Follow the path to a dead end and pass through the wall.
  14. 14
    In the secret treasure room, open a red chest for a Courage Ring. A blue locked chest is also present.
  15. 15
    Back on the main path, head north. Before going up the stairs, go right through the north-east corridor to pick up a Teleport Stone.
  16. 16
    Go up the stairs.
  17. 17
    Floor 3F: Pull the lever to disengage the second lock, unlocking the elevator. Use the Teleport Stone to exit the dungeon.
  18. 18
    Return to the Adventurer on Floor 3F. A cutscene will play, indicating an upcoming boss battle. Equip Star Pendants to ward off poison.
  19. 19
    Approach Janne to initiate the boss fight.

Boss Fight: Amphisbaena

  • Level: 24
  • HP: 5000 (x2)
  • Weakness: Water, Dragon

Boss Mechanics:

  • The Amphisbaena has two heads that attack independently.
  • One head absorbs magic and has low physical defense; the other absorbs physical hits and has low magical defense. Use Examine or a Magnifying Glass to identify them.
  • Attacks: Rollover (party damage), Poison Breath (party poison), Tounging (2 hits), Bite (1 hit + poison).
  • Spin Shuffle may occur, rearranging the heads. Keep track of their positions.
  • If one head is defeated, it will be resurrected after two turns with Rebirth, recovering a quarter of its HP. Attack both heads to defeat them efficiently.
Tips
  • Equip Star Pendants to mitigate poison damage.
  • Use the Attack Item Amp ability (Catmancer) with Zeus's Wrath against robots if needed.
  • Focus attacks on both heads to defeat them quickly before Rebirth activates.
  • Defeating Amphisbaena allows you to proceed to the Top of Ancheim.

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