The House of Eld, from Fables by Robert Louis Stevenson (1850 - 1894), pub. 1914...

Somewhere in the world, the people must wear a “gyve”, or iron shackle on their right foot, which causes them to limp and suffer from sores. Jack believes it is his mission to free the people from this curse. He learns that a sorcerer of the House of Eld is responsible for the gyves, and that if he kills the sorcerer three times, the shackles will fall off. The sorcerer appears to Jack in three guises: as his uncle, his father and his mother. Jack kills each one, but when he returns home, he finds that everyone now has a gyve on their left leg. Furthermore, his uncle, father and mother are all dead.