[You have dramatically increased your knowledge of the Demonic Factors.]

After Yeon-woo finished making false tracks and planting evidence near the lake, he ripped up the book in his hand. It was De Roy’s records, which Yeon-woo had received as a reward for killing the Ceratopsian Dinosaur. 

[You have destroyed De Roy’s records (Part Two). Additional use of the artifact has become impossible.]

[The hidden piece is being revealed.]

De Roy’s records looked just like an old diary, and it only revealed its true appearance after it had been ripped apart. Yeon-woo’s right hand quickly absorbed the fragile paper, and a black insignia appeared on his palm. It looked like a mountain goat with a pair of horns.

[You have gained the skill ‘Demonic Studies’.]

[Demonic Studies]
[Rank: D+]
[Proficiency: 0.0%]
[Description: The records of the demon hunter De Roy, who observed demons his entire life. You can borrow the power of a demon on the 98th floor through black magic. As your proficiency increases, you can make contracts with stronger demons. 
Currently, parts of the studies are missing, and rank will increase when the other parts are found.]
[*Devil’s Incantation
After paying a price, you can create demonic energy needed for black magic. The condition is that you find a skill book to use black...