Distracting Carapace

Your skin is studded with pieces of iridescent chitin that ripple like oil on water. When you move your body in a distracting way, your allies can take advantage to move stealthily. When you Aid an ally who is trying to Create a Diversion, instead of the usual effects of Aid, you can roll an Acrobatics or Performance check and use that result to determine the outcome of the diversion, instead of attempting a Deception check.