Keys at a glance
| Key / door | How to get it | What it opens |
|---|---|---|
| Iron Key | Cast in the underground Smelter from a key mold + 5 Coal + 8 Scrap Metal. You first need to cast a larger key to reach that corridor. | The door next to the Jaguar Door |
| Prison Key | In a chest in the skeleton room behind the Iron Key door. (The developers have said some key placements vary.) | The inner prison door → spider prison |
| Small Keys | There are several. The 2nd one hangs on a hook at the far end of the scorpion area, around the pits and climbing spots. | Includes the high door across the gap in the main hall |
| Jaguar Door | 3 Key Pieces, each cast in the Smelter from its own mold (5 Coal + 8 Scrap Metal). | The Silver Dagger |
| Sun & Moon coins | In the kitchens on the left and right of the bat dining hall. | Placed in the water statue’s hands, they drain the water |
The water statue (Sun and Moon coins)
- Find the Sun coin and the Moon coin in the two kitchens on either side of the bat dining hall.
- Put both in the hands of the water-spouting statue. The water drops and a chest appears.
- In the Marble Ruins (by the fountain and corn), that chest holds the Gold Talisman — one of the 6 gold treasures for the true ending.
- Leave both coins in place — taking one back raises the water again.
Smelter basics
Every cast key costs 5 Coal + 8 Scrap Metal in the Smelter. Building your own Smelter needs Clay — see how to get Clay.