Board Thread:Episode Discussions/@comment-46104015-20200616080319

Episode 457 Naruso Shippuden, at 3:17 minute. It shows Deidara accepting his ring given from Pain. As you can see there is no trace of the mouth on Deidara's hand.

Either it's a graphic error or Deidara has the ability of change the visibility of their palms from visible to hidden or vice versa. 