Gutsu Gutsu no Mi

Introduction
The Gutsu Gutsu no Mi is a non-canon Paramecia-type Devil Fruit that allows the user to manipulate metals such as silver, making them a blast furnace human (高炉人間 Kōro ningen). It was eaten by Bill.

Usage
Bill uses the fruit's power to create weapons, making his crew armed and powerful.He also takes weapons out of himself and encase his opponents as silver statues.

Strengths
The fruit allows the user to manipulate metals such as silver in an unknown fashion, being able to create tools such as weapons.

The process seems to be that every ore bill eats is literally smelted and molten inside his belly, which heats up to the point it glows and his hands phase into it, where he can take up the metal into solid shapes or molten drops that can simultaneously burn and encase the opponent.

Weaknesses
The fruit has no known weaknesses other than the standard Devil Fruit weaknesses. Although its possible the user requires a stock of metal ores to make use of his smelting abilities.

Trivia

 * The basis of his power drawns many similarities to Enel's Gloam Paddling, as both use heat to melt metals freely into new shapes, although while Enel uses eletricity, Bill uses the heat from his own devil fruit.This ability is also
 * similar to Gildo's own devil fruit, but not limited to one type of metal.
 * This is also the third filler devil fruit that grants the user control over heat coming from their body.