Skip to content
Part 9
The Binding of Isaac: Rebirth

Part 9

Complete walkthrough for Part 9 of The Binding of Isaac: Rebirth, covering bosses Gurdy, Larry Jr., and Loki, with strategies and tips for each encounter.

By ···10 min read·Multi-source verified
1 reading this guide  

Complete walkthrough for Part 9 of The Binding of Isaac: Rebirth, covering bosses Gurdy, Larry Jr., and Loki, with strategies and tips for each encounter.

Walkthrough
  1. 1
    Gurdy
    • Spawns boils that grow and shoot blood. Destroy boils by hitting them until they shrink and disappear. Fully grown boils shoot blood; one shot stops them firing but they regrow if not destroyed.
  2. 2
    Shoots five blood drops from its mouth, aiming at the player.
  3. 3
    Spawns red-bodied flies that attack after a short delay. Can also spawn more dangerous Pooters that shoot blood.
  4. 4
    At the start, Gurdy has two boils. Kill them before they grow. Gurdy is immobile. Move around, destroy boils, and stay out of range if necessary. Deal with flies immediately, prioritizing Pooters. Dodge Gurdy's blood shots and attack when safe.
  5. 5
    Larry Jr.
    • A boss in the Basement, consisting of two segmented worms that move randomly and quickly.
  6. 6
    Worms can speed up, and their sizes may differ, but total segments remain constant.
  7. 7
    Damaging a segment enough destroys it. If the head is destroyed, the next segment becomes the head. Destroying a middle segment can split the worm or connect remaining segments.
  8. 8
    Worms drop 'poo' behind them. Running into poo makes the worm change direction. Popped poo can drop health or soul hearts.
  9. 9
    Strategy: Stay far from the worms but close enough to hit them. Be patient, as they often move away before tears hit. Avoid getting cornered and always have an escape route. Use poo as a shield. Focus on killing one worm at a time.
  10. 10
    Easier in rooms with less terrain to avoid getting cornered.
  11. 11
    Loki
    • A boss found in The Depths 1.
  12. 12
    Loki has four main attacks indicated by its facial expression:
    • Contentment (four hands in mouth): Teleports to a random spot.
  13. 13
    Contentment (two hands in mouth): Shoots projectiles in cardinal and diagonal directions.
  14. 14
    Happiness: Spawns a Boom Fly (black or red).
  15. 15
    Surprise: Shoots 8 projectiles in all directions.
  16. 16
    A 'Pokey' moves randomly around the room and cannot be destroyed; dodge it throughout the battle.
  17. 17
    Loki has high health; use Boom Flies against it by detonating them near Loki.
  18. 18
    Strategy: Use Boom Flies for damage. Stay far from the Pokey to avoid it detonating Boom Flies prematurely. Stay on the edges of the room and keep enemies on one side to manage movements. Loki's direct attacks are less deadly than the Boom Flies and Pokey.

100% Human-Written. AI Fact-Checked. Community Verified. Learn how AntMag verifies content