The Impossible Island offers great challenges to the whole Idle Miner World.
You need 250ac Fire Cash to unlock the Impossible Island.
To unlock the mines, you will first need to forge Keys by going to the
Key Forge Island.
The Impossible Island has 10 different mines:
- Dark Shores
- Dangerous Shores
- Impossible Shores
- Dark Passage
- Dangerous Passage
- Impossible Passage
- Dark Gateway
- Dangerous Gateway
- Impossible Gateway
All 10 mines have a unique and different design.
The costs to unlock the mines are:
- Dark Shores -- 5 Bronze Keys
- Dangerous Shores -- 15 Bronze Keys
- Impossible Shores -- 20 Bronze Keys
- Dark Passage -- 25 Bronze Keys & 5 Silver Keys
- Dangerous Passage -- 30 Bronze Keys & 10 Silver Keys
- Impossible Passage -- 35 Bronze Keys & 15 Silver Keys
- Dark Gateway -- 45 Bronze Keys, 25 Silver Keys & 5 Gold Keys
- Dangerous Gateway -- 50 Bronze Keys, 30 Silver Keys & 10 Gold Keys
- Impossible Gateway -- 55 Bronze Keys, 35 Silver Keys & 15 Gold Keys