Goblin Omelette

Goblin Omelette is a drill upgrade module costing 99 Goblin eggs that generates 1 fuel every 20 seconds.

The craft is unlocked in The forge upon reaching HotM tier 4.

It takes 1100 hours to refund the cost of creating this upgrade, making it very ineffective. (3 fuel per minute = 180 fuel per hour. 99 Goblin eggs x 2000 fuel each = 198 000 total fuel. 198 000 fuel / 180 = 1100 hours)

On top of that, there is currently a bug where if you are mining a block while gaining a fuel, it resets the block breaking, making it even less useful, and even harmful to the productivity of each drill.