Darksteel

Unit value: 250 gp.
Armour: A non-magical armour made with darksteel reduces the lightning damage you take by 5. It's also used to craft armour of lightning resistance (metallic armour only).
Weapons: A non-magical weapon made with darksteel deals an additional 1d4 lightning damage. It's also used to craft lightning damage-dealing magic weapons, such as the javelin of lightning.

A darkened blue metal that only forms in areas affected by thunderstorms, known for having that energy inside of it.

Type

Ore/Mineral