Bionic Arms

Four sprawling bionic arms appear on your back.  For the duration, you gain the following benefits:

You count as one size larger.

You add 8 to your Strength score.

You gain a 30 foot climbing speed.

By using at least 3 of the bionic arms, you can move up, down, and across vertical surfaces and upside down along ceilings, while leaving your hands and the last bionic arm free.

Your bionic arms count as melee weapons with which you are proficient.  They have a reach of 20 feet, don't require your hands to be wielded (as you command them directly with your mind), and deal 2d12 bludgeoning damage on a hit.

You can make special shove or grapple attacks with the bionic arms, but you can't have more than 2 targets grappled by the bionic arms at a time.

You can expend 5 feet of movement to move a target grappled by one of the arms 5 feet in a direction of your choice.  You can do this multiple times in the same turn as long as you have enough remaining movement.  If you move a target more than 20 feet away from you, the grapple ends.