When the Sub-Mariner uses the sword to kill his wife Marrina, who had become a monster, the blood curse is revived. The curse begins to transform Whitman's body into the same mystic metal as the blade. He is forced to don an exoskeleton when the curse's creeping paralysis begins to affect his mobility. He also shows signs of mental instability. Ultimately, the blood curse becomes so virulent that it will draw blood from anyone even touching the Black Knight. After the Avengers were disbanded, Whitman joined Thor to defend Asgard from an invasion of the Egyptian God Seth. After the battle, the curse converted the Black Knight to a statue of stone again. The statue is brought by the Avengers to the knight's castle in England, under the care of Lady Victoria Bentley, an old friend of Whitman. After Lady Victoria tries a spell on the statue, Sir Percy takes possession of Whitman's body to stop the blood curse. He takes a young Irish man called Sean Dolan as his squire. Together they go to Doctor Strange 's house to ask for help in the battle against Morgan le Fay and Mordred, who intended to return to the physical world using Morgan's old castle in Ireland. The witch summoned the demon Balor, but the heroes are rescued by Valkyrie (summoned by Victoria Bentley). After banishing the villains, Sir Percy's spirit merges with the Ebony Sword, canceling the curse and returning Whitman to his normal state. The Black Knight begins a relation with Victoria Bentley and keeps Sean Dolan as his squire.