From the Steve's Carts Wiki:
The Galgadorian Drill digs out a 9x9 hole and is faster than the Hardened Drill. You are going to need a Reinforced Hull to use it. While this drill is incredibly powerful, it is also very expensive. If you make a MystCraft world with dense ores then it is highly likely that you will be able to recover all the diamonds you utilised for this drill.
Crafting
Crafted with 2 Galgadorian Metal Bars, 1 Diamond Block, 1 Hardened Drill and 3 Enhanced Galgadorian Metal Bars.
Raw materials:
68 Iron Ingot
195 Diamonds
156 Obsidian
45 Ender Pearl
113 Blaze Rod
180 Slime Ball
90 Ghast Tear
90 Spider Eye
90 Brown Mushroom
90 Sugar
Mining Speed
Here are some examples of the mining speed from this tool.
| Block | Time | ||
|---|---|---|---|
| Dirt | 1 t | ||
| Stone | 1 t | ||
| any Ore | 1 t | ||
| Spider Web | 1 t | ||
| Mob Spawner | 1 t | ||
| Ender chest | 1 t | ||
| Obsidian | 1 t |