Horrorfex

Source: Codex: Dark Eldar (2002), p. 13

As the vehicle falls upon its foes, arcane grenades made from captured Eldar wraithbone sow discord and terror within the enemy's ranks. It is fitted with a larger version of a Terrorfex, which can be fired instead of another of the vehicle's weapons in the Dark Eldar Shooting phase. It has the same effect as a Terrorfex except that is has an 18" range.