Huge Object

Armor Class: 15 
Hit Points: 150

Trebuchet Stone (Requires Load and Aim). Ranged Attack Roll: +5, range 300/1,200 ft. (can’t hit targets within 60 feet of itself). Hit: 44 (8d10) Bludgeoning damage.

A Trebuchet is a catapult that throws its payload in a high arc so it can hit targets behind walls. Loading a Trebuchet requires two Utilize actions, and aiming it requires two more Utilize actions. Then a crew member can take the Trebuchet Stone action.