Artificer's Arm

The arm cannon can be used to make a ranged attack as a bonus action with a range of 60 feet. The attack deals 1d6 force damage. If the target is made of metal, the attack deals an additional 1d6 force damage. You can use intelligence instead of dexterity for the attack roll.

The arm can be used to create a small construct. The construct has 1d4 hit points and can be used to deliver touch spells. The construct lasts for 1 minute.

The arm can be used to empower a construct. The construct gains an additional 1d4 hit points and deals an additional 1d4 force damage.