*Uses light magic to heal* He didn't say it killed dragons, he said it can make [b]SOME[/b] dragons nulled or weakened, which could be useful if one of your dragons were to escape the shout you used to enslave them. I have raised dragons, too. But not that kind. These dragons pick their Riders, not the other way around. They pick their name, and they have to learn to trust you, not fear you for your powers.