Grotto-Heaven Pavilion's Lecture
Although Saber of Nirvana wasn't an Imperial Lord-level paramount technique, it was still a Tribulation-level ultimate technique.
By fusing Saber of Nirvana's intent into his Body-Protecting Peacock Robe during combat, he could increase his strength in every aspect.
As long as I don't use it to cultivate my body, dantian, and Essence Soul, it won't bring me any harm. After all, I'm just using it as a combat technique. Meng Chuan knew this very well. This was because Ancestral Master Archean Eon had left behind records regarding techniques like Dark Lightning. It was fine if one used such techniques for reference, but if one used such a technique to cultivate their Godfiend body or Essence Soul, huge flaws would crop up.