The Book of Nalu was Black Knight Sangore's last resort.
Marvin was too fast for Sangore to use his special abilities from Hell that Saydis had granted him.
Offensive skills weren't very useful when he couldn't even keep track of his target.
Moreover, Sangore had found out from Saydis that Marvin was also closely related to Hell, so those abilities might not be able to injure him.
At this point, he could only take out his trump card!
The Book of Nalu was an Artifact, while also being a terrifying, evil book.
Marvin had always been wary of the Book of Nalu, making sure not to let it invade his soul.
Because of how careful Marvin was, the Book of Nalu had no chance to control his mind, but he also wasn't able to get many benefits from it.
Besides sometimes using it to control someone's soul, the Book of Nalu was nothing more than a hot potato to Marvin.
But it was different for the Black Knight.
