This plugin introduces a curse mechanic that applies to weapons. A cursed weapon works like any other weapon, but once equipped, it can't be removed. This means that the player can't trade, sell or remove the weapon.
The only way to unequip a cursed weapon is to break it. If your game supports the broken weapons option, once the cursed weapon breaks, it can be moved like any other weapon.
To apply the cursed state to a weapon, use the custom parameter {curse: true} on that weapon