Unlock Location:
- Start from the fast travel point in Ruined Sumplands in the Carcadia Burn area.
- You will find a Driller Sight, "Saw's Clench "
- Head inside and at the end you will encounter the Gruntubulous Boss
Farm Method:
- Defeat Gruntubulous.
- Use the Encore Machine nearby to reset the fight.
- Repeatedly defeat Gruntubulous until
Spinning Blade drops.