"The four-legged beast emerged from the mist, moving gracefully across the water without a sound. Remyst initially perceived it as if it were flying towards her, and the spiral horn in the center of its forehead emitted a brilliant light. For a moment, the light focused on Remyst, instantly healing the wound on her forehead; she could tell because the blood stopped flowing. Now, with her vision no longer clouded by blood, Remyst saw that it was a unicorn—more beautiful than any creature she had ever encountered in her life.” - Baltymont's Fairy Tales, Book III - Magical Creatures.

The unicorn is a wise and extremely mysterious creature, it only appears and communicates with those it wants. There was a time in the past, when swarms of unicorns galloped across the prairies across the continent. However, the magic of their horns (mostly folklore), which is said to be able to create a potion that gives immortality - has caused unicorns to be hunted. After all, people only know about unicorns through fairy tales, because they have refused to appear on this continent. And the unicorns in the mist brought them into a world filled with lust for them.