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 feels a lot more pain because of his Devil Fruit. "And above all things have fervent love for one another, for "love will cover a multitude of sins."" Yes, he Devil Fruit doesn't act like a regular logia power where the ability negates damage unless the attack is powered by Haki.

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.