Explosion Release

is an advanced chakra nature. This chakra nature seems to give the wielder the ability to utilize explosive chakra in combat, allowing them to cause explosions in objects they come into contact with. Gari of Iwagakure is the only explicit known user of this kekkei genkai. It is unknown what this nature entails.

Also, it seems that Deidara's Exploding Clay ninjutsu are somehow related to this chakra nature. It is likely that he utilizes the kinjutsu he stole to knead this explosive chakra into his clay.

Trivia

 * As Deidara claimed he possessed this kekkei genkai, it suggests his Exploding Clay is related to it, despite it being an referred to as being earth-based techniques.