Although they are happy in their relationship, it is not without problems. He marries Levana and crowns her as Commonwealth Empress. Kai returns to the Commonwealth while maintaining his romance with Cinder. Eventually, he realizes that she is evil and leaves her. After this incident, Levana divorces Kai and becomes Princess Ruby of Beacon. She meets Prince Eric of Atlantis who saves her from drowning and they fall in love. When King Arthur learns that she is still alive, he seeks out Prince Eric to negotiate a peace deal with him. However, when Ruby refuses King Arthur's offer, he declares war on Atlantis. During the battle, Ruby is killed by Merlin after he uses his magic to transform her into an immortal phoenix bird to save Atlantean culture. With her death, the peace between Earth and Atlantis breaks down forcing both worlds to go to war again. After many years, Kai realizes that he loves Cinder again and they reunite. However, she does not feel the same way and wants nothing to do with him. Desperate, he goes to see Morgana who gives him an idea on how to win Cinder back. Using his new found power, Kai resurrects everyone that he has ever loved and makes them stand in front of him. Then, he creates a world where everything is perfect and they can be together forever.