I can tell you from personal experience the gift the Storyteller uses the right God the union will be better off for it without getting ridiculously overpowered. One trick to help this is allowed them to start with an ancient dragon creation rules. If you get a perfect union which if I remember is when the essence is within 2 of each other you don't necessarily have to different characters but one character that has another one whispering in their ear. For a Storyteller this is an invaluable tool because it gives you an in character reason to whisper into your players beer and suggest that's...