I have been working on a scenario to play with a group of friends however I wasn't sure what system we would be using. We decided on 5e D&D but I've run into a problem with the core motivation of the villain.
Very briefly, my idea was a lesser nobleman using an ancient spell book to try and bring their child back from the dead. Originally I had the idea that bringing their child back would work by transferring the child's soul into a body but it had failed several times leading to the PC's investigating several missing children in the village.
The problem is that now we have decided on D&D I can't think of any reason why someone looking to bring back a loved one from the dead wouldn't just go to a cleric. What's more the way resurrection seems to works in the game is that a soul is tied to a body so how could the soul of a dead person enter another body. I could have missed something since I'm not super familiar with D&D so any ideas would be appreciated.