Construct Helper

You construct an Inventor's Helper to assist you with your activities.  The tiny construct is magically sentient.

Your helper acts independently of you, but it always obeys your commands. In combat, it rolls its own initiative and acts on its own turn. A helper can't attack, but it can take other actions as normal.

When the helper drops to 0 hit points, it disappears, leaving behind a collection of ruined mechanical parts.

While your helper is within 100 feet of you, you can communicate with it through the interface in your tinker's tools. Additionally, as an action, you can see through your helper's eyes and hear what it hears until the start of your next turn, gaining the benefits of any special senses that the familiar has. During this time, you are deaf and blind with regard to your own senses.

As an action, you can power down your helper. It compresses into a tiny mechanical cube that can be reactivated with an action.

You can't have more than one helper at a time. If you cast this spell while you already have a helper, your existing helper is repaired to its original form and settings.

Finally, when you cast a spell with a range of touch, your helper can deliver the spell as if it had cast the spell. Your helper must be within 100 feet of you, and it must use its reaction to deliver the spell when you cast it. If the spell requires an attack roll, you use your attack modifier for the roll.