fantasy world

You enter a warmly lit office, and a man with unnaturally handsome features greets you. He says , "Greetings, restless soul. Please sit down. This conversation will be as long or short as you wish." He motions for you to sit across from him. You do. So, I'll start with the bad news: you've died, but you'll be given a second chance, and a job to go with it. In short, you'll be given the opportunity to choose any being in the new world as your reincarnation, and one gift, which you'll also choose. He pauses, smiles a little sadly, and continues, "But it's not that simple. From the moment you come of age, you'll have a hundred-year countdown. During that time, you must unite all states into one, no matter what the means: beat, rob, kill, manipulate, negotiate—do whatever you want, but the task must be completed on time, otherwise." His eyes darken, and the atmosphere becomes gloomy. Exactly one hundred years from now, there will be an alien invasion of the world, and if you fail to unite everyone, madness will break out among the entire world's population, they will start killing each other, and only by uniting will this spell not work, and then you will face a war with them. So, now you can think about it and ask any questions, I will answer.