The male protagonist of "Starting from Douluo" was called Tang San and his spirit bone ability was called "Clear Sky Hammer". The Clear Sky Hammer was the ability Tang San's spirit bone, the Nine Nether Devil Hound, had given him. It could use spirit power to drive the enormous hammer to deal devastating damage to the enemy. When using the Clear Sky Hammer, Tang San's spirit power would swiftly concentrate on the hammer handle, making it exceptionally hard and at the same time releasing formidable spirit power energy to send the enemy flying or shattering. Tang San could also use the Clear Sky Hammer's spirit power control to make the Clear Sky Hammer produce different effects under different circumstances such as being able to produce spinning power in attack, powerful suction force in defense, and so on. The Clear Sky Hammer was Tang San's most powerful spirit bone ability. Through constant practice and tempering, the Clear Sky Hammer became one of his most powerful weapons.