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^?).

"Yami" (闇) is the Japanese word for "darkness". 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. This fruit is "unique" even for a Logia type.

The Yami Yami no Mi is a Logia-type Devil Fruit that allows the user to create and control darkness at will, making the user a Darkness Human (闇人間 Yami Ningen^?). It was eaten by Marshall D. Teach, also known as Blackbeard, who stole it from Commander Thatch of the Whitebeard Pirates' 4th division after murdering him.

Although the Dark-Dark Fruit is a Logia Devil Fruit, it doesn't allow its user to be immune to physical attacks with its power. However, it's still one with the strongest Logia Devil Fruits in the series. Just like its name suggests, the Dark-Dark Fruit gives its user the power of darkness.