Cannon

The Cannon is an interactive furniture item sold by the Pirate. It can be placed on the ground and, when activated, fires an arcing cannonball which explodes on contact with blocks, dealing heavy damage to anything unlucky enough to be stuck by it without destroying the blocks themselves. The Cannon is powerful but immobile, functioning as a fixed gun emplacement, and so is best suited for tasks such as home defense.

Despite taking up a 3x2 space, it only needs two blocks wide to be placed on, leaving the barrel of the cannon hanging off an edge.

A more powerful version of the Cannon known as the Bunny Cannon is sold by the Pirate when the Party Girl is present.

Use
Once placed, the angle of the Cannon can be adjusted by hovering the pointer over it and right-clicking in the desired direction. There are 9 possible orientations and it cannot fire downward, though the arcing trajectory of the cannonballs can be used to hit targets below the emplacement. Each click tilts the Cannon by one step.

The Cannon is fired by left-clicking it with a cannonball in hand, consuming the cannonball. You can also use the Action Key to fire cannonballs without having to hold them, but it should be noted that this functionality takes priority over using the Action Key to mine, meaning you must manually wield your pick/drill if you wish to destroy your world