Erunite

Erunite is a precious metal found in the Matoran Universe.

History
Erunite was exclusively found on the Isle of Whiro, although it does not occur there, nor anywhere else, naturally. After Erebus became a Toa, Matoran mined the rare metal-like material called Erunite from beneath the Isle of Whiro and shipped to the Isle of Artakha in order to assist in making a small weapons cache for their resident Toa Artakha. The amount of usable Erunite left in the Matoran Universe is very limited, however somehow samples have recently been observed in the hands of the Brotherhood of Makuta.

Properties
Matoran use Erunite to create a specific alloy they call Black ProtoSteel and is therefore highly valuable to the Matoran. The Black ProtoSteel is then forge into powerful armor, tools, and weaponry that has the ability to amplify the Elements of Shadow and Darkness, much like the Power Lance amplifies Takanuva's Elemental Energies. Its' rarity places it in only the hands of Artakhan master tool and weapons crafters.

Trivia
This substance was created by BZPower and C.I.R.C.L.E. member Erebus Nuva.