Activate L-3F7-Y

You activate your prosthetic hand and gain the service of a construct you have designated [monster]L-3F7-Y. 

L-3F7-Y acts independently of you, but it always obeys your commands. In combat, it rolls its own initiative and acts on its own turn. L-3F7-Y can't attack, but it can take other actions as normal.

As an action, you can temporarily recall L-3F7-Y to your arm. It travels through a pocket dimension and reappears on your arm immediately. Alternatively, you can fully deactivate it, requiring another cast of this spell to activate it again. When L-3F7-Y drops to 0 hit points, it immediately recalls and deactivates until you cast this spell again. As an action while it is active and attached to your arm, you can cause it to reappear in any unoccupied space within 30 feet of you.

Whenever L-3F7-Y is recalled via the pocket dimension, it leaves behind in its space anything it was wearing or carrying. If the space where L-3F7-Y would recall to is occupied, it remains in the pocket dimension until the space is unoccupied, at which point it immediately appears.

While L-3F7-Y is within 100 feet of you, you can communicate with it telepathically. Additionally, as an action, you can see through L-3F7-Y's eye and hear what it hears until the start of your next turn, gaining the benefits of its special senses. During this time, you are deaf and blind with regard to your own senses. 

Finally, when you cast a spell with a range of touch, L-3F7-Y can deliver the spell as if it had cast the spell. L-3F7-Y must be within 100 feet of you, and 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.