Ammo Box

This is furniture, not an accessory. Drop it anywhere with a two by two gap, click it, and the ammo saving buff sticks with you until you die or leave the world. There is no timer to watch and no cooldown, so in multiplayer everyone can tap the same box one after another.

You can mine it back up while the buff is running and the buff survives. That means it travels: place it, activate it, pocket it, put it down again at the next arena. Doing this before every boss attempt costs a few seconds and noticeably cuts what you spend on ammo.

Consumable ranged weapons are unaffected. Javelins, throwing knives, daggerfish and anything else where the weapon is the projectile still get used up on every throw. It only saves arrows, bullets, rockets, darts and the like.