There were many different races in the land of The New Age, which included Barbarians, Orcs, Giant Demons, Undead, and Elves. Countless of those creatures lived on the land for generations. Each race had its own specialties, which allowed them to progress easily in their paths.
For example, the forest and nature-loving Night Elves would be proficient in becoming Druids, while the wise Humans would be more likely to be able to understand the secrets behind magic and tools. As for the physically strong Barbarians, they would able to realize their true battle potential and strength. This was all because of their lineage, the power hidden in their bloodline!
As a result, many people sought after power and desired to obtain the innate abilities of these races. The God of War had been one of them. He had wanted to raise his own power by attaining the lineage of the Barbarians. Unfortunately for him, he had failed his goal and had been left with regrets.