Integrated Ballista

An Integrated Ballista is a massive crossbow that attaches to your back, becoming inseparable from you as long as you're attuned to it.

As an action, you can drop to your hands and knees assuming the prone position. An ally can then use their action to fire the weapon. It takes an ally two actions to reload the weapon.

Ranged Weapon - range 120/480 ft., one target. 3d10 piercing damage. Your Ally uses your proficiency bonus and attack modifier on the roll.