According to
Blackbeard, this fruit is "unique", even for a Logia type. It allows the user to transform into and control darkness. The darkness is a void that devours everything and crushes them, therefore allowing Teach to effectively manipulate gravity as well.
The user can absorb physical matter and attacks of any type, either by sucking it into a dark mist which spreads from the user, or into the user's body itself, and then crush them with gravity forces (similar to a black hole) or regurgitate everything back out. The user can use this ability to irresistibly draw the opponent to them. The most unique and powerful strength the fruit has is that the user also has the unique ability to nullify the powers of other Devil Fruit users by simply touching them and "sucking" their abilities out. All powers from other
Devil Fruit types from
Paramecia,
Logia, and
Zoan are affected by this. Also, apparently when people are sucked into the darkness, they tend to go into shock when regurgitated.
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The major weakness of this particular fruit, however, is that the darkness the user transforms into swallows up everything, including attacks. So unlike most
Logia users, the user of the fruit is still vulnerable to attacks as they cannot turn into darkness in order to dodge them. If they fail to absorb the enemy's attack in time, the user can be hurt like any other normal human being or even more, as stated by Teach. In addition, while the ability to nullify Devil Fruit abilities is powerful, the user must actually touch and remain in contact with the victim for the affects to remain constant, meaning that if the victim separates from Blackbeard, they quickly regain their Devil Fruit ability. Although, due to the fact that the user can control gravity, it is impossible to avoid contact. Other than that, the user is also affected by the standard
Devil Fruit weaknesses.