Namor the Sub-Mariner is one of the half-human and half-Atlantean, and he even fights Thor, Hulk, and Hercules in the comics. but he couldn’t win against T’Challa (Black Panther) the king of Wakanda – as well as the powerful warrior.
Does T’Challa (Black Panther) Kill Namor the Sub-Mariner?
In Avengers (2013) #40, Black Panther easily defeated Namor, T’Challa was invited by Namor to join the first Caball, seemingly for Wakanda’s sake. T’Challa refused to join. Namor with his arrogance and temper started attacking Wakanda in the form of a massive tidal wave. Namor battled Black Panther in a brutal fight, as a result, T’Challa won and spared Namor’s life.
In Marvel comics, Namor is an Avenger and later X-Men who has caused great pain to T’Challa in the destruction of the capital city of Wakanda. To understand T’Challa’s intense hatred besides the death of his countrymen by Namor you must understand how it began.
Backstory: Avengers vs X-Men Saga
Avengers vs X-Men saga saw the return of the Phoenix Force, the cosmic entity of death and rebirth, as it looks for its new host, believed to be the teenage mutant Hope Summers, who will possess all of its power. Cyclops and the other X-Men want to protect her and prepare her as if she’s to be the mutant savior, while Captain America and the Avengers want her handed over to them so they can figure out what to do with her and keep the world safe from a potentially deadly fate. This leads to a great big battle between both teams past and present. It also shows the end of T’Challa and Ororo’s marriage after they take sides with their respective teams.
The Phoenix Five
As the Phoenix Force nears Earth, the Avengers fight the X-Men on the Blue Area of the Moon, while Iron Man and Giant-Man prepare a disruptor weapon to kill the Phoenix Force. Iron Man pilots the weapon against the Phoenix Force, but when he uses it on the Phoenix Force, instead of killing it the blast forcefully alters the entity and divided it into five fragments which bond with Cyclops, Emma Frost, Namor, Colossus, and Magik.
In AVENGERS VS. X-MEN #7 and #8 where Namor, at the bidding of Emma Frost, attacks Wakanda, murdering T’Challa’s people. Since Namor now has the blood of Wakandians on his hands, T’Challa will seek his revenge upon the King of Atlantis, no matter what.
But before you take up for Namor saying he wasn’t in the right state of mind. Namor has a disgusting secret about why Thanos during Infinity came to Wakanda killing Wakanda. If I recall, Namor, in spite of his arrogance and temper, has a pretty amicable and mutually respectful relationship with T’Challa; he even invited T’challa to join the first Cabal, seemingly for Wakanda’s sake (Which is ironic, considering all the harm and suffering that he will be bringing upon Wakanda later on).
in the Canon Universe, T’challa aka Black Panther actually defeated Namor in the comics.