From Lexicanum

The Staff of Light is a mystical weapon used exclusively by Necron Lords.

An exception among necron technology, the staff does not use Gauss Weaponry principles, instead it absorbs energy from thin air to release in the form of powerful lightning bolts. A secondary effect of the energy is a steep decrease in the temperature around the wielder, the cold freezes the limbs of the opponents, mechanical or not, who shatters when hit by the staff.*¹.

Later versions sport a Fractal Edged Blade on the top of the staff for increased damage.*².

Sources

• ¹:White Dwarf 218
• ²:Codex: Necrons (3rd Edition)

See also

• Necron Armoury
• Close Combat Weapons