Yang Song used his True Energy to draw a few Corpse Melting Talismans and Cleansing Talismans, which were basic rank talismans, and cleaned up all the corpses as well as their scattered blood.
For those evil monks, Yang Song had no pity for them. From the look of it, they should've done this kind of thing frequently.
Actually, when Xuan Kong first approached him, Yang Song knew that the old monk did not have a good intention already. He was just playing with him along the way.
First of all, there was a slight smell of corpses on Xuan Kong's body. This kind of smell couldn't be washed off by water or soap alone, because it had already penetrated into his body.
Creation is hard, cheer me up!