Energy Siphon Blade

The Energy Siphon Blade or the Nihu-Motara Energy Siphon Blade was a weapon capable of absorbing and using a being's life force.

History
Orders were placed for the “Nihu-Motara” Energy Siphon Blade shortly before the Great Cataclysm. When Makuta Teridax took over Metru Nui by posing as Turaga Dume, he found many uses for the Toa defending the city- While most were merely sent to be killed by his hired Dark Hunters, two Toa were sent for a much more productive purpose. A Toa of Water and a Toa of Sto ne were shipped off to Xia to act as test-subjects for the new weapon, which would, like a Vorahk, be capable of absorbing a Toa or other being’s life force, but would also take the absorbed energy and channel it over the sharp blade.

Function
The Energy Siphon Blade was given a series of prongs at the blade’s tip that, when scraped against, stabbed into, or even firmly pressed against a being, would absorb its raw strength and energy, both powering the sword and weakening the opponent. This made it a very effective tool against Toa, Skakdi, and other powerful beings. Three models were produced- Model B, Model C, and Model D. B was designed for Toa-sized beings, C for titan-sized beings, and D, through the use of Shrink and Enlarge Kanoka, can change size to accommodate a Makuta’s shape-shifting. (It is not available to anyone but the Brotherhood.) Originally a Model A was conceived for Matoran-sized beings, but it was deemed unprofitable and was scrapped early on. It is not without its disadvantages, however -- Though testing on the Toa of Water showed it to be highly effective on beings of low or average strength, testing on the Toa of Earth demonstrated that it can absorb only so much power from the stronger elements such as Stone, Earth, and Iron. They generally have a stronger resistance to it. It is assumed that it can also control the life force of a Makuta, but the Brotherhood has outlawed testing of this nature with punishment of death.

Trivia

 * Although the technical name of the weapon is the Nihu-Motara Energy Siphon Blade most people refer to it as simply the Energy Siphon Blade.
 * The Energy Siphon Blade was created by BZPower member Wrinkledlion X
 * Greg Farshtey did not canonize the history of the Energy Siphon Blade, only its function and appearance.