The God

"Why hello there." The main character hears a voice in their dreams.

They look around and suddenly found themselves floating in the air, marveling at the sight of an utterly humongous tree, that reached a sky alien to them, with the outline of countless stars and planets as far as the eye could see.

"Now then," The same voice said, "I'm sure you probably think you're dreaming at the moment. And in a way, you are. After all, you're asleep. But unlike most dreams, this is all real, believe me. Who am I, I hear you wondering? Well, I suppose you can just call me...God. One of them anyway. You see, most people believe that there has only ever been one God. Thing is, that's only true in some realities and parallel universes. But in an Omniverse so large as to be unmeasurable there are bound to be other dimensions with multiple god-like entities due to simple statistical probabilities."

"So, why am I telling you all this? You see, I started getting a little bored with my next to omnipotent might. There is not much I can't do with it after all and eternity is quite long. So, I decided to entertain myself by granting more limited reality-warping powers to someone at random across the omniverse and see what happens. So, I traveled to this gigantic tree that I am sure has caught your attention. To keep it brief, it is located at one of the pillars of creation, and as a result, gods like me can use its roots and branches to travel anywhere in the cosmos or to bring forth someone or something from any reality. And that lucky someone is you. You're welcome!"

"Now, before you interrupt me, let me explain what I meant by "limited" reality-warping powers. Long story short, from now on you have absolute control over every member in your family tree, past, present, and future. And by absolute, I mean boundless, to the point you can reshape reality and even their respective pasts when your powers specifically involve them. All you have to do is think or say what you want them to do or be and it will happen. Again, you're welcome!

"However, and this is important, your new abilities won't work on you or anything else if it doesn't also involve a relative of yours. For example, if you wish yourself to be super strong, that wouldn't work but if you wished to get physically stronger every time you drank the cum from your sisters' orgasming cunt, then that would do the trick. As a result, these limits will you to get more creative with your wordplay to get your desired results, especially when it comes to wishes on a grander scale."

"As I said, you will have to specify most of the changes you want to make, but there will still be a more passive side effect befitting of your new status as the God: while it won't be noticeable at first, your cum will now have the capacity to extend the lifespan of both yourself and any relative you have sex with, ranging from weeks to months depending on the amount, to a full year every time you get a relative pregnant. The same applies if you are the one getting pregnant. It won't be full-scale immortality, for that you will need to perform an active wish but depending on how insatiable you are with a given family member, it could easily turn out to be a nice bonus. Once more, you're welcome!

"Oh, and another important thing," the formless voice added, "While I have just described the main requirements to make your powers work, there are actually quite a few rules I added that to the inner workings of your abilities that take precedent in grey areas but I am not telling them to you right now because I am impatient to see how you start. You could always experiment with your abilities in more unclear situations to get an idea but a faster way to get learn would be the just have sex with one of your relatives. The more you do, the faster these rules will spring to mind and then you can plan ahead with more anticipation. Just don't assume you know them all once you stop getting random knowledge on your head! I may end up adding some additional rules, later on, to keep the experience more interesting or balance out your abilities in case I forgot something important in my rush. But don't worry, the development of new rules won't cancel older wishes that are still active if they happen to be violations. That said, it will give you an incentive to keep a relative around to fuck. As I told you myself, eternity is quite long."

"That's about it then. I will send you back to your home universe now. Have fun with your new powers and entertain me while you are at it!