C2327 The Whereabouts of the Heavenly Crystal Spirit Iron

The Heavenly Book clearly records the use of the Heavenly Crystal Steel.

And the location of its acquisition.

The Heavenly Crystal Spirit Iron was extremely hard, and only the hottest flame on its forehead could melt it.

However, the refined iron ingots were not only extremely hard, but they also had good ductility.

They clearly could not be compatible with two attributes