Large Object
Armor Class: 15
Hit Points: 50
Ballista Bolt (Requires Load and Aim). Ranged Attack Roll: +6, range 120/480 ft. Hit: 16 (3d10) Piercing damage.
A Ballista is a massive crossbow that fires heavy bolts. Loading a Ballista requires the Utilize action, and aiming it requires another Utilize action. Then a crew member can take the Ballista Bolt action.