Black Sperm

""All heroes except Tornado, please form a line and wait for your turn to be killed."" "◾(To Tatsumaki) "About that...here, let me pass through for a sec'.""

Black Sperm is a major antagonist in the anime/manga One Punch Man. He is a Mysterious Being and one of the few Dragon Monsters in the Monster Association. Black Sperm makes his first appearance known during the S-Class heroes' raid on the Monster Association.

Appearance
Black Sperm has the form of a humanoid monster where his body is completely black with only his face being white and the only distinguishing color. He has an antenna on top of his head.

Personality
Black Sperm is very boastful about his abilities and is easily angered whenever people, in his own words, "look down on him since he is a sperm looking creature". He doesn't seem to value human life as he was prepared to kill a child that was kidnapped by the Monster Association without any regret or remorse. Whenever any of his copies merge together with him, he becomes more arrogant, not showing any sympathy or pity about his other copies and tells them to merge with him simply because of his superior power.

Super Fight Arc
Black sperm makes an appearance at Gyoro Gyoro's speech at the Monster Association HQ and questions serving under Orochi, the leader of the Monster Association, stating that they are only allies at the moment and are only there to crush the Hero Association (not caring if he angers Orochi which could threaten his life). Coincidentally, he reluctantly talks upon Gyoro Gyoro's speech about challenging Orochi for leader to himself.

Monster Association Arc
Black Sperm appears again when Busaiku is separated from Garou. Black Sperm pursues the kid in hopes of killing the child. Atomic Samurai steps in and manages to allow the kid to run to safety. However, Black Sperm soon overwhelms Atomic Samurai due to his ability to split into numerous versions of himself, as well as regenerate at will.

After Tatsumaki destroyed the Monster Association HQ, Black Sperm and several other Dragon level monsters emerged from the rubble to attack her. When Psykos temporarily cuts off Tatsumaki's psychic power, Black Sperm grabs Tatsumaki in a giant arm and attempts to crush her. She is saved by Genos, however the cyborg gets his arms ripped off by Black Sperm and Gums. Black Sperm and the rest of the monsters then proceed to watch Psykos toying with Tatsumaki until Genos decided to attack Fuhrer Ugly. Before Fuhrer Ugly could retaliate, Bang suddenly joins the fight and effortlessly kills two of the Monster Association's remaining members before being knocked out by Homeless Emperor. Black Sperm then takes this opportunity to knock Bomb unconscious.

Black Sperm then decides to continuously beat up Genos until King finally decided to take a stand. The remaining members of the Monster Association then try to think of a way to take on King. After King managed to buy some time against the remaining monsters, Tatsumaki began to recover and turn the tide of the battle. In an attempt to defeat her, Black Sperm fused one trillion copies of himself into the much stronger Multi-Cell Sperm. Unfortunately for Black Sperm, the newly formed sperm is effortlessly killed by Tatsumaki. Afterwards, Black Sperm sends a thousand copies of himself to perform a kamikaze attack against Tatsumaki to buy time as he takes Busaiku hostage, thus forcing the heroes to simply stand and watch as he fuses ten trillion of himself into his ultimate form, Golden Sperm. This new form proves incredibly dangerous, as Golden Sperm is able to take down Tatsumaki so fast that nobody else could even follow his movement with their eyes. However, this victory proves short-lived, as the newly mutated Garou shows up, destroying 99 of the 100 remaining copies of Black Sperm and killing Golden Sperm after a brief battle that none of the heroes could even see. Now down to only one life, Black Sperm slips away to watch the battle from afar.

Psychic Sisters Arc
The next day, after encountering Saitama, Black Sperm and Overgrown Rover follow him home as pets. The two formerly dangerous monsters are currently entrusted to Butterfly DX and Chain'n'toad due to Forte losing a bet with Saitama all of a sudden, when he finally witnesses how strong Saitama is.

Power and Abilities
Prestige: As a high-ranked member and a Dragon-level Mysterious Being of the Monster Association, Black Sperm is an extremely powerful monster. In fact, he could be considered one of the most powerful if not the most powerful member of the Monster Association and in the series. Sweet Mask himself notes that if all of the S-class heroes fought Golden Sperm, it would be a very difficult task. Along with this, he was the only one besides Saitama who was able to fight against evolved Garou on equal footing, even if it was only for a few moments.

Physical Abilities
Immense Speed & Reflexes: Black Sperm is able to dodge Atomic Samurai's slashes. Furthermore, when transformed into Golden Sperm, he blitzed an injured Tatsumaki. Even as an individual Black Sperm, he was able to keep up with Genos' immense speed.

Immense Strength: Contrary to his appearance, Black Sperm has great strength and was able to badly damage Atomic Samurai in one hit. He was also capable of lifting a huge boulder and Golden Sperm could fight with Garou for a few moments.

Immense Durability: Black Sperm possesses enormous durability. As Black Sperm, he was able to easily withstand all of Genos and Atomic Samurai attacks. As Golden Sperm, not even Tatsumaki's attacks phased him, although this was while Tatsumaki was significantly weakened.

Shapeshifting: Black Sperm is able to increase in size and manipulate his body shape in any way he chooses.

Regeneration/Replication: Instead of being killed, Black Sperm will only regenerate or split into even more copies of himself if he still has enough cell stock. However, there is a weakness to his regeneration: if the sperm copies decide to merge into one being, that merged sperm form will not regenerate if he is killed.

Fighting Styles
Hand-to-Hand Combatant: Black Sperm mainly relies on his brute strength and his skill in close-quarters combat during battles.

Coalescence (合体, Gattai): Black Sperm permanently combines his cells to form a more powerful version of himself. The more cells that he combines, the more arrogant the created version of himself will be.

◾Multi-cell Sperm (多細胞精子, Ta Saibō Seishi): Any number less than ten trillion of cells that combine. The strength of this form has yet to be observed as the only Multi-cell Sperm observed was quickly taken out by Tatsumaki.

Kamikaze Attack : Black Sperm sacrifices a number of his cells to attack a target. This has been mainly used as a distraction.

◾Golden Sperm (黄金精子, Ōgon Seishi): Requires at least ten trillion cells to create. This form vastly increases his powers and he is able to defeat an injured Tatsumaki and was able to temporarily fight with evolved Garou, something none of the other S-class heroes could do.

Augmented Strength: As Golden Sperm, he was powerful enough to partially penetrate through Tatsumaki's barrier as well as cause great destruction in his battle with Garou.

Augmented Speed & Reflexes: Golden Sperm is so fast that he was easily able to blitz Tatsumaki in a split of a second with no visible effort. He is also so fast that he was able to keep up with Garou's speed and none of the S-class heroes were able to see their fight.

Augmented Durability: Golden Sperm has incredible durability as he was able to take several attacks from evolved Garou and continue fighting. Psychic Resistance: Golden Sperm is able to very effectively resist injured Tatsumaki's psychic attacks. However it has been confirmed that if she were at full power, he could lose.

Psychic Resistance: Golden Sperm is able to very effectively resist injured Tatsumaki's psychic attacks. However it has been confirmed that if she were at full power, he could lose.

Trivia

ONE has mentioned that if Tatsumaki used all of her power, she could have defeated Golden Sperm.

Black Sperm can increase his sperm stock by eating protein.

Gallery