C248 Large Luo Xuan Tian Mirror
This was because Earthkilling believed that the Nine Hell Magic Blade that he had sacrificed ten years of his lifespan in one go, even though there was only one of it, was comparable to the might of the two or three Nine Hell Devil Blades that he had used before.
Therefore, just this one move was enough to kill Gu Tianchen.
It could be said that Earth Slaughter had already schemed to the limit