You have Darkvision with a range of 60 feet.

As an Weapon you are noticeably more resilient then a humanoid. You gain piercing immunity, slashing, fire, lightning and cold resistance (if you are a metal weapo, if not you don't gain these benefits).

You have Advantage on saving throws you make to avoid or end the Charmed condition.

You use magic to senes your surroundings. Thus you are immune against the Blinded and have the Detect Magic active without using concentration.

You don’t need to sleep, and magic can’t put you to sleep. You can finish a Long Rest in 4 hours if you spend those hours in a trancelike meditation, during which you retain consciousness.

You can be used as Weapon for your Companions. You may swap position with the weapon of them at the begin of there turn. As a Weapon you are treated as a +1 weapon of your current type and deal magical damage of the weapons type.