How to Unlock the Legendary Spinning Blade Grenade

Spinning Blade is a Jakobs Grenade

Spinning Blade is able to be grappled to Catch the rebound to refund a grenade charge.

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 untilSpinning Blade drops.