How Can a Piece of Scrap Metal Kill the Sky?

In this world, there are still familiar realms and familiar levels of cultivation, but the weapons are also divided into three, six, and nine levels. Let's see how a piece of scrap metal that is looked down upon by others can destroy this aloof heaven! Even scrap metal can carry great righteousness all over the world! Fight for this human race, this demon race, this beast race, and this demon race!