What it does
Power 250 (Rare), about 4x the Power of the Golden Pickaxe.
How to get it
Pickaxe Shop in the Safe Zone for $160K. There's also a Robux button.
Pro tip
Comes right after the Green Trail. From here on, keep alternating: next trail, next pickaxe. Robux shortcut: Pickaxe Tier 5, 89 R$ (tier match is our best guess).