Xiao Zhen was amazed at seeing them. He looked here and there and found many of the demons were already dead. After that, he smiled and said "Alright, everyone I only need ten minutes" Then, he sat crossed his leg and completely focused on the enlightenment.
This enlightenment is about Life and Death Sword. It was a little unexpected but he gained something from this battle, so he just needs to realize it completely. The Life and Death Sword is not a Cultivation Art or a Martial Art. It is just a sword, a single sword to completely kill the enemy.
If you reach the pinnacle of Life and Death Sword, then you only need one sword to break anything and everything. Just a sword is enough to annihilate the Universe. But it is very hard to reach that point, from Xiao Zhen's perspective; he has only understood fur, or even just the corner of a fur.