I remember once downloading one from terraria online, a long while ago. The mod literally just let you use two weapons at once, regardless of what the weapons were. It worked by having whatever was in slot 0 be used by pressing right-click, and left click for whatever else you would normally use in the hotbar. I know its an overpowered concept, but its a ton of fun to have two people with dual minisharks! Would someone be able to make this?