The Forgotten Dragon

Yi was born a cripple unlike his tween sister Er who had a dragon bloodline flows in her. One day their clan underwent a surprise attack from the neighboring clans who want to dominate the city. Yi and Er were left in their burning room unable to get out, fortunately, their grandpa came but the problem is due to the battle their grandpa right hand has been chopped. Can only take one person. Without a second thought, his grandpa left Yi and save Er. Awaiting for his death a miracle occurs, an old man name Guangying was badly hurt by his enemy and to skip from its pursuers he used the portal scroll. He was sent to a burning house with a child lying on a floor, he felt pity for the child so he saves him and helps him to become strong and trained for two years. Before he left Yi, he discovers something unusual on Yi's bloodline.