Rotating Blades

From Lego Bionicle

The Rotating Blades were two very large Protosteel blades used by Brutaka. They were given to him by Axonn. One swing of them was enough to defeat all six Toa Nuva and the entire Voya Nui Resistance Team. His Rotating Blades carry an electrical charge and contain an "electronic rock cutter" on the other side.