The Aquiline Heart

This story is a morality tale about the dangers of both pride and power. Never able to catch the Stormseeker Eagle after many years of chase, the Flamebringer Dragon preyed instead on the Eagle’s pride, saying the Eagle was too weak and cowardly ever to chase the Dragon. The angered Eagle pursued the Dragon, not realizing until too late that it had been tricked into flying down a tunnel into the depths of the world, where it did not have enough room to maneuver.
‌ The Dragon bit the Eagle’s throat and began to drink its blood for its power, when the Worldshaper Worm came upon the scene. The Worm was blind, but the Dragon knew that it could feel the beating hearts of both the Dragon and the Eagle. To avoid its treachery being discovered, the Dragon tore out the Eagle’s still-beating heart and hid it some place where it would never be tempted to try to get it again. This explains how dragons became the strongest creatures in the world, and teaches that those with too much power risk being turned upon by those around them.