Grappling Prosthetic

A Finely crafted prosthetic arm with a grappling hook attachment. Useful for moving across the battlefield quickly and climbing vertical surfaces.

As an action you can aim and fire your grappling hook. Roll a ranged weapon attack in order to land the hook on any object that can bear your weight (if it is a creature they must be at least 2 sizes larger than you in order to take the weight) most objects (like walls or roofs) have AC 15. If successful you can then use a bonus action to retract the hook granting you a flying speed equal to your movement speed directly towards the target of your hook (object or otherwise). 

If your target is a creature you also deal 3d4+3 piercing damage as the barbed tines dig into their flesh.