Have you read the Runelords series? They're from David Farland, and they have a feel all their own. They're fantasy books (duh), and in their world, one person can give an "endowment" of one of their aspects to another person. For example, if a blacksmith gives an endowment of strength to his lord, the lord will be as strong as two guys, but the blacksmith will become too weak to do just about anything. If one of them dies, the endowment is undone, so the people who receive the endowments make sure to take good care of those who give them, and if I remember correctly, it's something that has to be freely given - you can't force people to endow you with things.