There exists a legend in Equestria, of a single pony who conquered all challenges placed before him. Nopony has laid eyes on him since after the war. Some say he disappeared. Others say he returned to whatever place he came from, only to return should Equestria need him once more.
He is the only pony to make not only Princess Celestia acknowledge his power, but even Princess Luna has bowed before him in admiration.
Ponies now talk about him as if he were a myth, somepony who never existed to begin with, just an old pony's tale to scare children into behaving.
"Don't misbehave, or the Black Knight will come for you and eat you. His favorite snacks are bad children."
Even now, however, there are some who remember what he did for them, recognize that he did in fact exist, and believe that he was real and will one day come back to help them once more.
Ponies to this day talk about his impenetrable armor, as black as the night itself, his blood red cape, and his single piercing eye.
But, even still, even if they cannot remember their savior's name, even if he fades from their memories, forever lost in the annals of a history long past, they will always remember one thing.
That large, monstrous weapon. That hulking heap of pure metal. That blood soaked hunk of steel that he used to cleanse Equestria of all its evils.
His sword, Dragonslayer.
He is Guts, The Black Swordsman, or, as he is known in Equestria, Blood Hoof, The Black Knight.