C91 What the hell

I know that the black Qi on the Seven Stars' Blade is the Yin Qi from the Demon God's Blade, but I didn't expect the Demon God's Blade to be unable to deal with this small talisman.

"What is this talisman, Master?" I asked.

"Ghostblade." Short word, but I still don't know what it is. After all, I have always been by the Goddess's side to study magic