The Dragon King's Rise

There was a young man who fought at the top of the world only to lose. After the young man's defeat, he and the Vampire Prince who wanted to kill him were transferred to another world. Once there and they tried using magic the caused that world's race(s) to completely vanish. Once the young man saw what they done he immediately began to cry and scream. While that was happening, the Vampire Prince noticed the young man attempting to create multiple realities only to began to fail. The Vampire King looked at the young man and say, "I do not care what reality you want to belong in. However, do not attempt to ever find me or care for me. I will kill you otherwise, grow strong and once we can truly fight on the grand stage I shall call you brother." At that moment every reality that the young man was attempting to create was created. Once he entered in one both he and the Vampire Prince both liked the same room in the same hotel. They both unconsciously protected that place.