Iwagakure Kinjutsu

This kinjutsu that was passed down in Iwagakure allows the user to knead chakra into materials. It was originally made for infusing chakra into any object but Deidara just uses it with his clay.

Once, Deidara stole this technique in his quest to find the ultimate art. He used it to create his Exploding Clay. It is likely that the mouths on his palms and chest are a direct result of using this technique.