The elves were humanoid beings created by Boon to channel energy being harvested by the earth back to him. Boon took great care to ensure his creations were far superior to Swift's humans at harvesting and chanelling the earth's energy. What he ended up with were benevolent creatures that lived in harmony with nature and were able to channel the plants and animal's energies without destroying any life in the process. Boon was very pleased with what seemed like perfect beings, but he had one serious flaw in his design. The elves were not created as warriors and he had not anticipated the extremely violent reaction of Swift and his humans.
More to come.
The elves get slaughtered. I ruined the ending.