One Piece: Demon's Extract Novel

Elior awakens in One Piece's most treacherous prison—Impel Down's Eternal Hell—after transmigrating into this brutal world. Stripped of companions and facing the looming Summit War with merely fourteen days remaining, he discovers a powerful system. Through his signing ability, he unlocks Ice Teigu and claims Demon's Extract, a legendary power that transforms him into an unstoppable force in the darkest depths of the prison.