Fireworks Cannonball

The Firework Cannonball is an ammo item used by the Ship Cannon. To load a cannonball inside a cannon, press E (default key) when you face the fuse. Cannonballs can be stacked into outerwear slots, like arrows. This particular cannonball explodes in mid-air into a firework.

Source

 * Gold Pirate Chest (rare)
 * Gold Pirate Challenge Chest (rare)