Fires Orokin designed bolts that are faster and sharper but with reduced range.  Whenever this weapon kills a target it pins the creature to the wall. Proficiency with a heavy crossbow allows you to add your proficiency bonus to the attack roll for any attack you make with it. The DC for the Dexterity saving throw to half damage of this weapons attack is 8 + proficiency bonus + Dexterity bonus. Creatures that fail the saving throw by 5 or more are knocked prone and immobilized.