God Isn't Real, But I Am

What happens when a strange phone connected to another universe ends up in the hands of a simple teenager? They decide to experiment how much the mass follows the media, and how powerful blackmail can be. The fate of a whole world is in your hands, and you're starting to enjoy it a little too much. It's only harmless entertainment, right? No one's dying if they're not actually real.

Or-

A bored teen gains a god complex after messing around with a magic phone, and they ain't no good god either.
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Cover isn't mine, Thank you Moonlight for making it!