Preparing to Leave

After a while, Duan Ling Tian narrowed his eyes when he thought about the grey flame in the defective metal piece. He muttered to himself, "I can only draw out a small part of the grey flame for now, and it's comparable to a primitive Celestial Fire. I wonder if this is the limit? If it's the limit, then, once I completely master it, it'll be comparable to mediocre Celestial Fire. If this isn't its limit, once I have full control of it, it should, at least, be comparable to a prominent Celestial Fire." His eyes brightened as he drew close to the end of his sentence.