About Magu Magu no Mi
The Magu Magu no Mi is a Logia-type Devil Fruit that allows the user to create, control, and transform into magma at will, turning the user into a Magma Human (マグマ人間, Maguma Ningen?, Crunchyroll: "Magma-Man"). It was eaten by Fleet Admiral Sakazuki, formerly known as Admiral Akainu.
The fruit's power was first shown during the Summit War of Marineford, but its name was not revealed until SBS Volume 62.
Even when compared to the standard Logia, which are powerful in their own right, the Magu Magu no Mi possesses incredible power, particularly in terms of offense. The main strength of this Devil Fruit is that it allows the user to become, control and produce magma (molten rock) to attack their opponents with. The intense heat can vaporize an iceberg instantly and boil seawater that the magma happens to land in. Additionally, the heat from the magma melts away almost any flesh or metal it comes in contact with and is capable of burning away entire parts of a human body, leaving the victim in a scarred or disfigured shape. With this power running for a ten-day battle, it was strong enough to permanently change the weather of one half of an island into a blazing inferno.