The only way to get it back to the overworld is through bucket travel.
Step 1. Use Mine-Up.
Step 2. Use BuildCraft to pump the lava to the surface.
Step 3. Profit.
The only way to get it back to the overworld is through bucket travel.
Step 1. Use Mine-Up.
Step 2. Use BuildCraft to pump the lava to the surface.
Step 3. Profit.