The Yami Yami no Mi is a Logia-type Devil Fruit that allows the user to create, control, and transform into darkness at will, making the user a Darkness Human (闇人間, Yami Ningen^?).

The first is the Logia-type Yami Yami no Mi (Dark-Dark Fruit), and the second is the Paramecia-type Gura Gura no Mi (Tremor-Tremor or Quake-Quake Fruit), which Blackbeard stole from Whitebeard's dead body.

Blackbeard's power absorbs the flames and responds that his power absorbs everything around him including pain, stating that he is unable to simply turn into an element and dodge an attack. He claims the pain he then receives is much greater than what a normal human feels.

It originally belonged to Genei, 1st and original Commander of Whitebeard Pirates' 2nd division, but was stolen and eaten by Marshall D. Teach, also known as Blackbeard.