Murakumogiri

Murakumogiri is a naginata that was used by the Yonko Edward Newgate, better known as Whitebeard, until his death. It is one of the 12 Saijo O Wazamono grade blades.

Appearance
Murakumogiri is a massive naginata, fitting the size of Whitebeard, with a striped pole (with the stripes being all plain brown in the anime, but red and yellow in the manga) ending in a spherical pommel, and a large, curved blade attached to the pole with a brass bolster, decorated with a relief of a sea snake, and langets protruding onto the blade itself.

Abilities
With Whitebeard's immense power and skill, the naginata was strong enough to clash with Shanks's saber, which caused the clouds (and even the heavens) to split. Whitebeard usually employed the naginata with both hands, but could also use it proficiently with just one hand. Most of the time he kept it in his right hand, though he occasionally planted its blade in the ground in order to use both of his hands for his Devil Fruit. The naginata could be used in conjunction with his Devil Fruit and Busoshoku Haki to increase the already great damage it could inflict, as well as to neutralize any potential Devil Fruit defense his opponents may possess.

The naginata is extremely durable, having stopped Akainu's magma attack without melting or receiving any visible damage, though this may have resulted from Whitebeard coating it with Busoshoku Haki. It sustained a two-handed downward swing from giant Vice Admiral John Giant as well. Two years after Whitebeard's death, the weapon still showed no signs of decay in spite of two years of weathering the elements, further demonstrating its durability.

History
Whitebeard acquired Murakumogiri sometime after his childhood. He was first seen with it during the Great Age of Pirates, when he took control over Fish-Man Island.

Whitebeard died on Marineford two years ago with Murakumogiri in his hand, and it was placed on his grave near Sphinx, with Whitebeard's Jolly Roger and coat hanging from it, and remained there since.

Trivia

 * Murakumogiri is the only known Meito that is not a sword.
 * The name of this weapon is likely derived from that of the legendary Japanese sword popularly known as "Kusanagi-no-Tsurugi" (草薙の剣), though it was originally called "Ame-no-Murakumo-no-Tsurugi" (天叢雲剣).