Davis's soul prowess was at the High-Level of Eighth Stage, so when it manifested and turned into physical might, it directly became a stage lower, and that was equal to the prowess of an average High-Level Martial Master Stage Cultivator.
However, this was King Soul Stage soul force, so it could be more powerful, and they wouldn't know until they experienced it for themselves.
However, they wondered why he made a move when Fiora was already massacring before they saw his lips move.
"Fiora, you can kill, but don't kill many. I don't want you to be condemned by the stupid heavens as you might incur negative karma as spoken in some myths."
"Yes, Davis..."
Fiora had no idea, but she obediently complied as she returned to them while Zephya gracefully shot back into Fiora's dantian.
Looking at Fiora's expectant reaction, Davis smiled.