This mod adds various features from Supplementaries to the trial chambers including:
Chambers
Ballista
Use bellows to blow mobs into bamboo spike pits
Climb across the ropes to reach the cannon and shoot down mobs
Normal spawners: pillagers, slimes
Tough spawner: plunderer
Loot
Weapons vault: 4-6 bombs Wall dispensers: Bombs Supplies barrels: Quiver
…and various decoration additions to the whole structure, including launchers, candles and cannons