Sand Clone

Gaara shapes his sand into a lookalike of himself that fights for him. Unlike other clone techniques, the sand clone's composition is obvious at all times, only taking Gaara's shape and not his exact appearance. Because of this, the clone can be reverted to sand at any time, most often when being attacked; as it's punched or kicked, Gaara can use the clone's sand to immediately capture the opponent's limbs. Alternatively, Gaara can use the clone as a decoy, drawing opponents to it and, once they're close enough, manipulating the clone's sand against them. Whereas other clones can only take so much damage before being destroyed, Gaara can reform the sand clone regardless of what happens to it.

During the Fourth Shinobi World War, Gaara is shown making a sand clone that looks like the Third Tsuchikage rather than himself. Similarly, the sand clones he makes exactly resemble who they're based on, not being sand-shaped lookalikes of previous depictions. This allows Gaara to hide other materials within the sand clones to be used against opponents who attack them, such as Gold Dust against the Second Mizukage's Steaming Danger Tyranny.

Trivia

 * In the anime, Sasori used a sand clone as a replacement, although it dissolved after being hit.