Pheromone

Pheromone is a Pure Changeling from Equestria and is actually known as a 'True Changeling'. True Changelings are the original form of Changeling from the dawn of their creation by Princess Consciencea, the same Alicorn goddess that created the daemons. Though in their beginnings, Changelings could feed on more than just love. They could also feed on other emotions, and since magic in Equestria is tied to emotions, consuming them also powers up their magic. Pheromone saw that Changelings could be very powerful if they were loved by the entire world, seeing that by interbreeding with other races like with hippogriffs, they could evolve into better beings. This idea ended up spreading to the entire race like wildfire and they became a race of conquerors. But Consciencea deemed the Changelings a failure because of this and altered them into feeding only on love and retreating underground while Pheromone disappeared. (TBC...)