Demon Sage's Contract

"The Demon of True Wisdom" Lamb Sotos. The first demon lord in the history of the abyss who was kicked to the human world by Lucifer, the Lord of Demons, because he forgot to participate in the bloody battle while sleeping. After being deprived of his real name, losing all his power, and even being imprisoned by a mortal, Lamb discovered something called "The Contract of the Brave" from his head. [Congratulations on being selected as the new sage] [Please choose the hero you want to contract——] Lamb stared at the empty column in the Hero's Contract, and then at the priestess who was interrogating him. "What are you looking at?" Miss Priest asked curiously. "I said, do you want to be a hero?" "???" [The brave contract is successful, the sage's expertise is unlocked*1]