Han Sen ignored the purple copper sword. He used the Dongxuan Aura, wanting to find the native creatures the purple copper sword mentioned.
With his power, controlling a native and having them pick up his sword would not be difficult.
When the Dongxuan Aura was cast, Han Sen knew things were as simple as he thought they would be. The weapon forest around had a powerful presence. Every weapon had its own presence.
The Dongxuan Aura was weakened by all those presences. He had only been able to cast his presence out at a radius of around 10 miles. He could not send it out any further than that, and that was just his observation power. If he wanted to use his power to control the native creatures, he would have to be even closer to them wherever they were.
