However, considering how powerful it is, Shanks' Future Sight could be the key to defeating the accursed prince. Observation Haki is one of the most powerful abilities in One Piece as it allows ...

This article contains spoilers from One Piece's Elbaf Arc. Shanks mastered Haki at a young age, showcasing incredible potential. Oda hints that Shanks has the strongest Haki, compared to Joy Boy.