Long ago, two races ruled over Earth: MONSTERS and PONIES
One day, war broke out between the two races.
After a long battle, the ponies were victorious.
They sealed the monsters underground with a magic spell.
Many years later...
Legends say that those who climb the mountain never return.

This is an Undertale X MLP:FiM mash-up, but it will still have potential spoilers to the game. If you haven't played it yet, then turn away now. Also, in keeping with the game, the main character is you, the reader.