Rasa

Controls iron sand via Magnet Release — denser and more lethal than ordinary sand, and a different power underneath

Magnet Release lets him control iron sand, denser than ordinary sand

Shapes iron sand into weapons mid-flight

Draws raw material from the ground to replenish his supply

The magnetic control is a bloodline ability, not a technique he learned

Iron sand cuts where ordinary sand only crushes, the stated advantage

Compresses earth into projectiles at speed

Sealed Shukaku into his own son, which is the origin of Gaara's power