By the time Cardan brought her back to the castle, the royal physician was there to check on Esme's condition.
The servants asked Cardan if they should get the royal physician for Luciana but Cardan refused it.
He did not know if that physician had healing abilities.
Cardan did not want Luciana to suffer from these wounds for long.
He wanted to heal her but the origins of his powers were impure. Other than the divine powers in his body, he had his mother's black magic. He could barely heal his own superficial wounds but he did not want to put Luciana in any danger.
Someone he knew possessed healing abilities. His elder brother. But that man was a spitting reflection of him. They did not meddle in matters that had nothing to do with them.