You have fashioned an unnatural or magical tie to a weapon of your choice, gaining the following benefits:

• Increase your Strength or Constitution score by 1, to a maximum of 20.
• A melee weapon you wield, and are proficient with, attaches to you, and grows in place of your arm. This arm can no longer precisely manipulate anything and can’t wield weapons, magic items, or other specialized equipment.
• You can’t be disarmed of that weapon, as it becomes a natural weapon, which you can use to make an unarmed strike. If you hit with it, the target takes damage equal to the weapon's damage, instead of the bludgeoning damage normal for an unarmed strike.