After Ning Qi refined it, he tried to input some dragon-slaying fighting energy, and saw the silver fighting energy slowly spread to the top along the lines on Gray Dragon Pao's body, and finally gathered at the gray dragon's feet, and then slowly overwhelmed it The whole body reached the mouth, and then Ning Qi saw a silver shell appear in its mouth.

boom!

The shells flew out, smashing a dozen trees directly, leaving a deep hole on the ground.