(Dark Energy - One-Punch Man OST)

https://youtu.be/CoRbgUZb0n4

Nakano: Not much is about the alien Boros other than the fact that he led a group of alien invaders called the Dark Matter Thieves and is dubbed "The Dominator of the Universe.", conquering countless worlds and being the strongest of his race in his homeworld.

Randy: However, while he was reveled in his subordinates worshipping him, he grew bored at the lack of competition and the thrill of fighting. Hm, why does that sound familar?

Adam: That it, until an alien seer informed Boros of a prophecy about a warrior from Earth who could give Boros a fight of his life. Excited, Boros and the Dark Matter Thieves arrived on Earth and made their intentions known by nuking A-City, causing the Hero Association to step in. And it was here Boros was confronted by a caped baldy known as Saitama, aka the One-Punch Man!

Lord Boros

Super Strength

Superhuman durability and speed

Flight

Hand-to-Hand Combatant

Restraining Armor

Shockwave Generation

Regeneration

Energy Projection

Meteoric Burst

Augmented strength an speed (via Meteoric Burst)

Collapsing Star Roaring Cannon

Randy: Boros' race are known for their regenerative ability due to their home planet's harsh environments which they were force to adapt into and it's no surprise Boros has easily one of the best there is, able to replace lost limbs. He's also honed him decades of combat experience and able to fire energy attacks. He also has flight and the ability to detect a person's aura to determine their power level and skill in hand to hand combat.

Nakano: However, if Boros wants to end the fight quick or determines his opponent is too powerful, he will discard his armor, which suppresses his full power as to not kill his foes quickly, and undergo a transformation dubbed Meteoric Burst, which augments his already immense strength and speed up to 11 and unleashes his strongest attack: the Collapsing Star Roaring Cannon! An immensely powerful energy beam that is stated to be capable of wiping out the Earth's surface. Or the Earth itself. Or even a star.

Adam: Yeah there's a lot of debate on how strong the CSRC actually is due to different translations from the anime, manga and guides, ranging from surface-wiping to planet busting to even star busting.

Feats

First opponent since Crablante that gave Saitama an actual fight (This is supported by the fact that he's the only opponent Saitama regarded as 'strong', placing him above the likes of Garou and Orochi

Led the Dark Matter Thieves

Destroyed most of A-City with his ship

Conquered numerous worlds

Is considered the strongest of his race

Should be superior to Melzargard and Geryuganshoop

Capable of lasting more than a couple seconds after Saitama's first punch

Launched Saitama to the moon at near light speeds

Strongest attack was stated to be capable of destroying the planet

Adam: Boros is easily of of Saitama's biggest foes in the early arcs. He is considered the very best of his race, conquered countless worlds and destroyed the majority of A-City with his ship. He's also superior to Melzargard, who can fight four S-Class Heroes, and Geryuganshoop, who's psychokinesis surpassed even Tatsumaki's, and she's the same childish brat who uno-reversed Boros' giant bullets back into his spaceship with enough power worth 470 Gigatons of TNT.

Randy: And he's even tough enough to take hits from Saitama. If you haven't figured it out just by the name alone, Saitama can literally one-shot almost anyone in the series which is saying something because Saitama once punched the Deep Sea King hard enough to completely stop the rain and destroyed a city-busting meteor. In fact, he's one of the few who can make Saitama go serious and once launched him to the moon at near lightspeed.

Nakano: And then there's his Collapsing Star Roaring Cannon. While some depict it as only a surface-wiping attack, the official OPM Databook confirms it's indeed a planet busting attack. This ranges from 710.25 Zettatons to 1.79 Yottatons of TNT. And Saitama was caught off-guard by Boros' Meteoric Burst speed given Geryuganshoop's claims of being lightspeed was a bad joke.

Popup: Saitama's Serious Series: Serious Punch, which deflected the Collapsing Star Roaring Cannon, is calculated at 11 Yottatons. However, this was done using Boros' attack as a base and cannot be scaled.

Weaknesses

Obsessed about the prophecy, unknowingly arranging the death of himself and his minions

Meteoric Burst rapidly drains his stamina; two hits left him breathing heavily

He'll be unable to regenerate if he's low on stamina

Defeated by Saitama

Nakano: However, Boros does have his flaws. His regeneration does have limits and using Meteoric Bursts drains his stamina. Like when he was exhausted after just throwing two punches at Saitama.

Randy: And his Collapsing Star Roaring Cannon will use all of his energy which his regeneration requires. And even then, Saitama, of course, punched the beam and the resulting damage shattered Boros' core, critically injuring and killing him. Ironically, while Boros went all out, Saitama still didn't use all of his power.

Adam: Still, it was not in vain, for Saitama indeed called Boros strong after so many battles with enemies that end up dying with just a single hit. After all, you don't get called "The Dominator of the Universe" for nothing.

 Boros: That's the way, Saitama. You are indeed worth defeating!