Dyna Stone

The Dyna Stones are weapons of mass destruction, and the object's of Zephyr's desire during the events surrounding One Piece Film: Z. They are stored within thick metal cases with transparent purple liquid, and explode when exposed to oxygen. Originally in the hands of the Marines and considered to be their trump card, Zephyr and his Neo Marines stole them for their own plans.

Appearance
The size of a football with an oval shape, 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 Zephyr, a former admiral, would seek it out for his own purposes. Though it's activation process is unknown, it can cause a powerful explosion that can wipe out an entire island.

History
Originally on the Firs Island's Marine base, Zephyr stole the stone in order to use it to destroy the three Endpoints, so he could release a large quantity of subterranean magma to flush away the Great Age of Piracy, along with the world.

Right after attaining the stone, which Borsalino was guarding, the Neo Marines used it immediately to destroy Firs Island, the first Endpoint. They then used the stone to destroy the second, Secon Island, and then positioned the weapon for the last point, Piriodo.

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Dyna