Twilight discovers that a "human" is due to pop out of an unmaintained portal in less than an hour. She discovers that they have the power to create whole universes, such as the one the ponies live in. In the wake of this revelation, it is of grave importance that the human be treated like a king on arrival, for his powers are yet to be known.

Therefore a welcoming committee is quickly organized, in which Rainbow plays an integral role.
She would much rather have avoided this.
But all of Equestria is at stake...

Note:
Contrary what the title and description may lead you to expect, this is not a power trip clopfic.
The clop scene is going to be very disappointing, if that's what you are expecting.