The demon king was a notorious force onto Varosha. He wanted to claim the realm as his own and thus set forth an army to invade the land. He brought turmoil to the realm taking whatever he wanted to obtain the power to overthrow the realm. He brought forth Unknown who became his generals for his army. The seven generals were given each a division to try and take over and control. However, the plans failed when five strong individuals rose to power and fought against the army. These were known as the Great Sages. The Demon King's plans were foiled when the sages arrived and a seal was placed onto him, locking him into a prison. Every year, the sages would return and enhance the seals preventing his escape.
The Demon King was a rule hailing from a rift that brought fear to the people he tormented.