Gura Gura no Mi

The Gura Gura no Mi, also known as the Gura Gura Fruit, is a Paramecia-type Devil Fruit that turns the user into an "Quake Man", allowing them to control seismic waves and generate earthquakes. Gura comes from "gurando", which is the Japanese way of pronouncing the word "ground", while "Guragura" is the sound of earthquake rumbling. It was eaten by Edward Newgate.

Strengths and Weaknesses
This fruit's major strength is that it allows Whitebeard to manipulate the seismic waves and generate earthquakes. These tremors can occur even at the ocean floor, thus creating tsunamis, giving him a virtual invincibility in sea or land. Fleet Admiral Sengoku has stated that Whitebeard holds the power to destroy the world. As it apparently has the power to destroy the world, it is by far the strongest Devil Fruit yet introduced, especially for being a Paramecia.

This Devil Fruit has no apparent weaknesses, aside from the standard Devil Fruit weaknesses.

Usage
Whitebeard has shown to generate massive earthquakes with this power. He is also able to create seismic waves in the ocean floor, forcing the seawater to form a massive tidal wave. When in use, Whitebeard moves his outstretched arms and literally shatters the air as if it were a pane of glass, creating the earthquake.

Trivia

 * This Devil Fruit's name is reminiscent of Whitebeard's laughter style, "Gurarara". This attribute is shared with Perona's Horo Horo no Mi.
 * The Gura Gura no Mi's powers make Whitebeard resemble the Greek God Poseidon, as the Emperor of the Seas who could cause earthquakes and tsunamis.