Just as Xin Yun moved, the surrounding Sand Dragons lifted their heads in unison, spewing streams of scalding sand which howled towards Xin Yun's direction.
Although Yinglong moved swiftly, and with Xin Yun's control, it twisted and dodged quickly, the distance was too close, and the velocity of the fire sand spewed by the Death Sand Dragons was too fast.
Even though he successfully evaded the attack of four streams of sand, four or five others still hit Yinglong in the blink of an eye, a quite respectable feat given they were surrounded.
As the sand hit Yinglong's body, Xin Yun's complexion instantly paled; since humans and dragons are one, the dragon's soul is the human's soul, the Human Soul is the Dragon Soul, and thus pain is felt by the human when the dragon body is attacked.
However, despite the pain, Xin Yun still managed to dodge most of the attacks and for the Shen Long Clan, there wasn't really an absolute weak point—except perhaps Xin Yun himself.