Devil Fruit Name: Kuro Honō no Mi (Black Flame Fruit)

Type: Logia

Abilities: Grants the user the ability to create, control, and transform into black flames that cannot be extinguished by sea prism stone or water. The flames can burn anything they touch, causing intense damage and creating an aura of darkness around the user. The user can also manipulate the flames to create constructs or weapons, and can absorb heat from the environment to enhance their power.

Weaknesses: Standard weaknesses of Devil Fruits apply, such as being unable to swim and vulnerability to Haki. However, the flames themselves are immune to water and sea prism stone, making them unique in their resilience.