Moon Lance

The Moon Lance was a Weapon of Light used by the Eldar in the First Wars before it vanished from history for around four millennia. It appeared again in Um'taran in 4175 during the campaign of the Host of Man, and it was returned to Gatteroth, before it was used to permanently destroy the Dark God, banishing his being from the circles of existence. It was assumed to have been destroyed in the subsequent atomic-level explosion.