Supplementaries Combat: Bombs, Cannons, and Traps
guide
Beyond decoration, Supplementaries adds a set of combat gadgets and traps. This guide covers how to craft and use them.
Explosives
Bomb — four Iron Ingot, a string and TNT; a throwable explosive.
Cannon and 
Cannonball — the cannon fires cannonballs, each crafted from five Block of Iron (or five lead blocks). A serious ranged siege weapon.
Traps and projectiles
Bamboo Spikes — a floor trap; the tipped version applies a potion effect, and washing a tipped spike with 
Soap (or Create's splashing) returns a plain one.
Confetti Popper — three dyes, three paper and gunpowder for a festive burst.
Rope Arrow — an arrow that trails a climbable rope; charges are added at a crafting table.- Quiver — holds arrows for quick firing.
Using them together
The bomb and cannon give a base real offensive options, while bamboo spikes and the trapped present handle passive defense. Because most of these are configurable, you can tune their power to your world before relying on them.
Covers the mod's in-game guide topics: