Naruto: Shippuuden

Synopsis

Choji's spiked cannonball attack proves ineffective against Kakuzu's special ability, which enables him to harden his skin. In Konoha, Naruto learns more about the five elemental chakra natures and their strengths and weaknesses in relation to each other. Kakuzu gets struck by Kakashi's Lightning Blade right through his heart, but survives and produces four masked entities from his back, one of which dies, as it had been struck by Kakashi. Kakuzu then uses the masks to attack Team 10 with powerful Wind, Lightning, and Fire Jutsus.

(Source: Wikipedia)

Akatsuki Suppression Mission arc: (13/17)