The Legendary Treasure that exists in the planet Dens. The explorers may explore through many caves, temples and Sea Temples that would be able to find all 7 Rainbow Keys to reveal the legendary treasure itself. In Paul Gekko's theory, the Blue Bible is the One Piece that was sealed in the island of raftel.
Description[]
The Blue Bible is the treasure chest filled with gold, silver and jewels and other items lost in ancient times.