章 820: Entering the City

Anyone who possessed knowledge about the wall’s material would be able to discover that the surface of this city wall was actually covered by a layer of extremely rare ‘Black Mirror Rock’. A city wall that was molded from such a material had the unique ability to reflect some attacks. It was quite a good choice to be used as a city wall even though this thing was quite rare. Yet, this Black Emperor Sect was actually able to use it to cover the walls of the city. Such rich foundation caused not only Xiao Yan but also the Little Fairy Doctor by his side to sigh in amazement.

“It is indeed expensive…”