Zero Dragon Power, But My Dragon Bloodline Breaks All the Rules

Lin Jin was the universally acknowledged weakling at the Holy Flame Dragonrider Academy. With zero dragon power, he had spent three years under the nobles' boots. His ribs were broken, and he could barely afford half a bowl of wheat porridge. Then one day, in an old dragon's lair, he found a useless dragon that had likewise been sentenced to death. [Bloodline analysis failed.] [Warning: Target's level exceeds the analysis limit.] Beneath nine layers of seals lay a pureblood from the ancient Purgatory. Later, another appeared, with golden-purple scales and a body wreathed in lightning. Her bloodline was just as impossible to identify. Their names weren't in the dragon registry? Then from this day on, he would write them in himself. Whoever had trampled him, he would climb over. Whoever tried to harm his dragons, he would make them pay back every last bit, with interest. The year a million demons surrounded Dragon City, he took his place at the very front of the walls. Only then did the world finally understand: So what if his dragon power was zero? His dragons had bloodlines beyond the limits.