To The Dragon Sword Sect.

Shi Lang nodded and asked, "How can you talk now when you are mostly silent in the sect?" 

Raksha replied, "Hmph, if not for you being as weak as an ant in the face of an Immortal Emperor, would I have to hide like this? That old man down there is also an Immortal Emperor. If I am to show my breath, they will confine me like that sword inside the sword hall. As for why I can speak now, thanks to the barrier they have cast here. It prevents Immortal Emperors from scanning this place." 

The terran nodded and focused on the three boxes before him. He looked around and said, "I think soul cultivation is the rarest of them all." 

Raksha replied, "Obviously. Did you think anyone could be a soul master?" 

Shi Lang raised his brow and asked, "What is a soul master? Wait, how do you even know all this?" 

The sword spirit replied, "It is just something I made up, but it fits."