Yami Yami no Mi

The Yami Yami no Mi, also known as the Yami Yami Fruit, is Logia type Devil Fruit that allows the user to become "darkness". It originally belonged to Commander Thatch of Whitebeard's 4th division, but was stolen and eaten by Marshall D. Teach.

"Yami" (闇) is the Japanese word for "darkness."

Appearance
The Yami Yami no Mi is a purple fruit made up of many small teardrop shaped parts with swirl patterns, and spreading green leafage sprouting from the top. It closely resembles a pineapple or bunch of grapes in shape and appearance.

Strengths and Weaknesses
According to Blackbeard, this fruit is "unique", and is different from standard Logia types. It allows the user to transform into and control darkness. The dark matter produced displays gravitational pull properties, giving the user the ability to exert pull from distances and specific directions to attract objects, or in great strengths to compress and crush anything to near zero volume.

The user can attract physical and projected matter by transforming into or generating dark matter and spreading it across an intended area. This spread of dark matter will pull items towards it, then crush or compress everything upon contact much like a black hole, until they're fully compressed and contained within the dark matter. Just like a black hole, the gravitational compression that occurs is very high, and can crush entire towns to be held within the black mist of just a few inches high. The user can then choose to relax the gravitational compressive actions and allow the already-crushed objects to rapidly expand until they regain former density and break free, flying back out of the dark matter. Any living beings subject to this compression within the dark matter have been shown to be released in shock. It is not stated yet whether this process kills, severely injures, or injures them at all.

The direction of the gravitational pull exerted can also be manipulated, such as doing a horizontal aimed pull, to target specific objects or persons to cause them to literally fall horizontally towards the user. Like earth's gravity, however, the pulling can also be countered by using strong-enough objects to hold a distance between the user and the enemy, shown when Portgas D. Ace made two flame spears and used them like stilts against Blackbeard's pull.

One major downside to this Fruit's powers, however, is yet again its dark matter's ability to generate gravity pulls. The gravitational properties of the dark matter, though focusable in strength towards a specific direction for far-ranged pulls, can not be altered in any way, and the dark matter will attract any matter within a specific range as long as they are present. The infamous Logia ability to disperse into one's elemental form and dodge attacks is thus rendered useless, because the gravitational effects would just pull the attacks specifically towards the dark matter, and this added pull even increases the damage done at times. The user therefore can only choose to take the full damage of the attack in his normal form, or risk getting increased damage in his elemental form.

The most unique and powerful strength of this Logia fruit is that the darkness has the ability to absorb Devil Fruit powers as well. Once physical contact is made with the enemy, all his Devil Fruit powers will be literally drained, causing him to fully revert to his flesh body. (This is unlike sea water or Seastone exposure which just removes bodily control while the user maintains Devil Fruit bestowed properties, like Luffy who still maintained his rubber properties while underwater despite his paralysis and asphyxiation.) This, though not an offensive attack in itself, is still especially deadly as most veteran Devil Fruit users are already used to having their powers and as such have stopped training the use of their physical bodies. The power will only stay in effect for as long as physical contact is made, and the enemy will regain his Devil Fruit powers and/or properties once he breaks free of the user's touch. This removal of the enemy's powers, coupled with the Yami Yami no Mi user's inability to disperse to avoid attacks, means as long as physical contact is kept any fight would stay a purely physical one. It is because of these unique circumstances that mean the user must be physically superior to his enemy in the first place before the powers can be considered beneficial, as stated by Blackbeard.

The user is also most likely affected by the standard Devil Fruit weaknesses.

Usage
The fruit's bestowed powers, as used by Teach, have been used so far for mostly combat purposes. He is able to fight on par with Ace, his former commander, despite Ace possessing the Mera Mera no Mi. With this frightening power of darkness, Teach plans to become the next Pirate King and conquer the world.

The named techniques that are used by Teach that involve the Devil Fruit are as follows:


 * Black Hole (闇穴道, ブラック・ホール): Blackbeard spreads his darkness over a large area and, much like a real black hole, swallows up anything he chooses. When swallowed it is subjected to a large amount of gravity and crushed, such as an entire village on the island of Banaro. During the Impel Down Arc, Teach have shown to swallow up humans as well and crush them along with the debris. This was first seen being demonstrated before Ace.
 * Liberation (解放, リベレイション): Used following Black Hole. Blackbeard expels all of the destroyed remains of what his darkness has swallowed up at once. This is especially good at demonstrating his power. This was first seen being demonstrated before Ace. Though it is unseen as of yet, in the anime Teach foreshadowed this attack can possibly be used to launch cannon balls and swords like projectiles.
 * Kurouzu (闇水, Dark Vortex): Extending one arm towards his opponent, Blackbeard activates the gravity power of his darkness to pull them into his grasp. Blackbeard can then attack them with his massive strength. This move is particularly useful in conjunction with the Yami Yami no Mi's power-nullifying abilities, since the target could easily avoid it by fighting at a distance from Blackbeard, as Ace attempted. The name of the attack is also a pun on the English word "closer", or "close". This was first seen being used on Ace in order to grab him.