as an acrobatics attack action, you fire an arcane arm that grabs a creature or object within 15 feet, if the target is heavier, you are pulled to five feet in front of the target, if that target is lighter than you, they are pulled to five feet in front of you, if they are the same weight class as you, you both have to roll for athletics, if you get a higher score, the act is treated as grappling a lighter target, if you get the lower score, the grapple is canceled