C378 An immortal estate, and it was also a storehouse of species …

This stone door had many tadpole-like runes engraved on it, as well as some prehistoric ferocious beasts that appeared to be very ancient. The material of this stone door appeared to be very ordinary, just like the common limestone. However, when Sun Yang accidentally used his sword energy and sword body to hit the stone door several times, he was unable to even pierce through a single line