The Dragon Mages had a whole vein of metal ore smelt itself into a huge Metal Dragon. Obviously, it looked like it belonged to the Mechanical Race, but in fact, it was just a rough prototype made of mechanical material. However, being a prototype had its advantages— such as being immune to the fatal power of a System Crash for the Mechanical Race, as long as I have no system, I can't crash.
Seeing this scene, The Holy Master, while casually killing two Dragon-slaying Swordsmen, exclaimed,
"There is a God of Metal in the universe. If he saw this Metal Dragon, he would probably steal it and then use it as a Saint."
"Forget it. How do you even fight this thing? I'm running away."
Adhering to the principle of not keeping promises + running away if unable to fight, The Holy Master was ready to make his escape.