Lind was very happy with the battle. The Nautilus had performed far above his expectations but there were still issues. Qi consumption for one.
Flying and evading he could do all day without end as well as basic Qi manipulation, but using the Qi sails or more complex attacks was a massive drain on the ship.
So long as he was at a good density, the Nautilus recovered decently, but if too low, it would not be able to keep flying and attacking or anything at the same time. At least it did not suffer the issues of cultivators since it could fly up and down as much as he wanted.
He also was glad his make-shift neutralizer worked. His harmony transformed Fiend Qi into natural Qi but he knew that would kill a Fiend if exposed for too long.
He had to tweak it quite a bit before he found something that negated but did not destroy Fiend Qi. It basically suppressed it in living beings but would completely empty out any artifacts or weapons if exposed.