Sea Prism Stone

The mineral that lets ships slip past sea monsters.

Sea Prism Stone is a material used by government ships to mask their presence as they traverse the Calm Belt. It is employed in conjunction with Sea Kings, the huge ship-eating monsters shaped like serpents that infest that region. The stone allows passage between the four seas and the Grand Line, which is otherwise difficult due to geographical barriers like the Red Line and the Calm Belt.

Quick Facts

Notable users:: Marines, World Government

Lore & Background

The World Government uses Sea Prism Stone to enable transport between the four seas and the Grand Line. Government ships employ the stone to mask their presence as they traverse the Calm Belt, which is infested with huge ship-eating monsters shaped like serpents known as Sea Kings. This allows the Navy to cross otherwise impassable waters.

Reader's Guide

Sea Prism Stone is used by the World Government and the Marines to navigate the Calm Belt, a strip of calm ocean infested with huge ship-eating monsters shaped like serpents known as Sea Kings. The stone masks the presence of government ships, allowing them to traverse this otherwise impassable region. This is one of the unique and mystical features that enable transport between the four seas and the Grand Line.