First off Arthas is the main character in the book and he is the prince. Arthas helps the owner's horse give birth. Two years later he tries to ride the horse, but the horse throws him off and gallops back to the castle. Arthas comes back to find his horse with a gash in his leg and the horse still ran with an injury, he named him Invincible because of his durability, strength, and speed. Later in the story, Terrenes, his father and Arthas start to get along. Two days later Arthas father is killed in the invasion of his castle. Arthas the finds the legendary sword of frost born.
