Chapter 1375, Found  

Ye Qingyu's words made Liu Shaji light up with excitement.  

Through the gate of the sword tower, the inside was seen glowing brightly. The inside was an empty space, and evidently some kind of very clever space formation. It was like a huge training ground, there were racks of weapons, platforms, military tents, as well as traces of airship ports and docks. Compared to the black traces outside that had been burned by Emperor fire, the sword tower inside was in a much better condition. There were only faint marks of fire damage and smoke around the objects and weapons.  

At the end of the military ground was a set of black steps leading up to the top.  

The steps were marked with traces from various battles before, as well as swords, spears, battle-axe...