Yun Jhin analyzed the defensive buildings of the headquarters of the Hao clan, he could see that they were made of a special material that he identified as Matrathite.
Matrathite was an artificial metal created by cultivators above the sage realm, only gods could create it, and depending on the stage the God was, the quality could differ, but from what Yun Jhin saw, they were defensive buildings created out of top-notch quality Matrathite!
These type of defensive buildings had to be worn down by constant attacks, even though the metal was very durable, if a God Realm expert wasn't behind it, it wasn't invincible but it was considerably annoying to destroy it.
