Dark Shadow: Fumikage's Quirk allows him to manifest a sentient shadow monster from his body that he can materialize and contract freely. Dark Shadow's energy is limited and can be drained by bright light. Dark Shadow retracts into Fumikage's body when it runs out of energy. The shadow entity's personality, strength, defense, and control depend on the lack of light. In bright light, Dark Shadow is weaker and smaller but still has considerable strength and defense and is easier to control, but in total darkness, Dark Shadow's size and parameters are drastically enhanced. It is powerful enough to rip out and cut down multiple full-grown trees easily. However, Dark Shadow is more difficult to control in the dark, causing it to rampage based on its own free will. As part of his training, Fumikage trained in a dark cave to increase his control over Dark Shadow, even when darkness empowers his Quirk. This training proved effective when Fumikage activated Dark Shadow in pure darkness, and it was still the same size it would be if it were daytime. Due to a run-in with League of Villains member Moonfish, it was revealed that, besides light and darkness, more internal factors influence Dark Shadow. According to Mezo, Fumikage's negative emotions (such as regret and indignation) intensify Dark Shadow, making it more unruly and powerful as a result, albeit at the cost of Fumikage losing control; Fumikage himself even stated that his anger causes him to lose control of Dark Shadow. Dark Shadow also seems capable of eating, as it took some food when Class 1-A celebrated Christmas.
Black Abyss: Fumikage dons and equips Dark Shadow onto himself, wearing it like a suit of armor or an exoskeleton. According to Fumikage, equipping Dark Shadow onto himself mitigates his close-range weaknesses. This Ultimate Move was previously known as Abyssal Black Body (深淵闇躯 Shin'en Anku?).
Covert Black-Ops Arms: Fumikage enlarges Dark Shadow's arms and smashes his targets with them.
Piercing Twilight Claws: Fumikage shoots out Dark Shadow's claw which attacks at great speed.
Sabbath: Fumikage changes from Black Fallen Angel to Black Abyss while maintaining his momentum to deliver a powerful blow
Light of Baldur: Fumikage uses his Total Release and Black Abyss to unleash a powerful punch against an opponent. This attack is also empowered by Inasa Yoarashi's Whirlwind.
Black Fallen Angel: It is a technique that Fumikage devised under the tutelage of the Pro Hero Hawks. Fumikage rests his body on top of Dark Shadow and Dark Shadow uses his own levitation powers to carry Fumikage.
Ragnarök: When Dark Shadow is summoned in dark conditions, Dark Shadow's power grows exponentially to the point where he himself can't control it. At this time, Dark Shadow's power is enough to defeat some of the strongest villains in an instant.
Womb: Fumikage summons an enlarged Dark Shadow towards an opponent, who then wraps around and swaddles itself around the target, preventing them from escaping.
Fleeting Blow: Using Black Abyss to cover his body with his Dark Shadow, Fumikage channels the power of Ragnarök in his fist and hits his opponent with a massive claw attack.
Total Release: Fumikage charges Dark Shadow using several sources of darkness, then unleases its full power against his opponents.
Enhanced Durability: Even without Dark Shadow, Fumikage is capable of withstanding vast amounts of damage. During the Joint Training Arc, Fumikage quickly recovered from a punch from Dark Shadow (who was under the control of Shihai). On Nabu Island, Fumikage was buried under rubble after Slice collapsed a cave on top of them and quickly walked after being rescued, no worse for wear.
Enhanced Reflexes: Fumikage has incredible reflexes. Despite Slice's superior speed and agility, Fumikage could still block all of her attacks during their battle and later seized an opportunity to incapacitate her briefly.
Tactical Intellect: Even though he is not the most academically efficient, Fumikage has proven to have a strategic mind. He ordered Dark Shadow to guard his team's blind spot during the Human Cavalry Battle and grabbed one of Shoto's headbands when the opportunity arose. Using the knowledge he has of Shihai's Quirk, Black, Fumikage was able to exploit the standby function of the latter's power by using his black-colored cape to trap the Scheming Hero, knowing that Shihai would instantly integrate with it. When pitted against Dabi, Fumikage, despite being placed at a disadvantage due to the enclosed area wherein they battled and the light generated by Dabi's flames, he was able to exploit an opening created by Geten's nearby attack and Dabi's tendency to monologue to escape the flame-wielder with Hawks' unconscious body.
Musical Talents: Fumikage has shown to be very skilled at playing the electric guitar.
Equipment[]
Cloak: Fumikage's hero costume includes a cloak. It is completely dark under this cloak, making Dark Shadow stronger.
Claws: During his fight against Slice on Nabu Island, Fumikage was shown to wield a set of gloves with metal claws. These claws were broken during the battle.
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