Two realistic pale twins, From the Middle Ages, back to back

Two realistic pale twins, From the Middle Ages, back to back, the left with violet eye, short black hair, black alchemist robes with technology, cut on the face,left arm with steampunk prosthesis, with pentagram and dagger, with a look of suffering, right with white nun clothes, long white hair, eyes closed holding a rosary, with an execution at the stake behind, the night.