Dyna Stone

The Dyna Stone is a weapon of mass destruction, and the object of Z's desire during the events surrounding One Piece Film Z. Originally in the hands of the Marines and considered to be their trump card, Z and his crew steal it for their own plans.

Appearance
The size and shape of a football, the Dyna Stone is stored within a thick metal case, which can then be opened to reveal a glass tube filled with light, transparent purple liquid and the stone itself. Gray in color, the stone has several large jagged marks which glow like magma.

Abilities and Powers
Its power is said to rival the Ancient Weapons in terms of mass destruction, and as the Marines trump card it is considered extremely valuable to them. It is useful enough that Z, an ex-admiral, would seek it out for his own needs.