Magnet Release

The Third Kazekage's unnamed kekkei genkai allowed him to convert chakra into magnetic forces. The Third studied the abilities of a previous host of the One-Tailed Shukaku and learned to imitate the power to control sand. However, when he imitated sand techniques, he incorporated iron powder instead, thanks to his special magnetic powers. He could use it to crush his opponents or even mould the sand into weapons. This Iron Sand can also clot up the joints of puppets, making them useless in battle as long as the Third Kazekage's magnetic field was in effect. The magnetism also grants the Third an absolute immunity against metallic weapons.

When the Third Kazekage was turned into a Human Puppet, Sasori gained access to the magnetic chakra, and by extent, the Iron Sand, which he imbued sand with his poison, increasing its lethality. The puppet was later destroyed by Sakura Haruno and Sasori's grandmother, Chiyo. As the Third Kazekage's ability to convert chakra into magnetic fields was unique to himself, when his puppet form was destroyed, the kekkei genkai became lost forever.

Trivia

 * The anime character Jiga also possessed a seemingly similar ability of magnetism. This was from ingesting iron when he was younger which essentially made him a human magnet.