Crystal Heart - The Magic of the Earth

After dragons hid themselves from humans, magic became a rarity. One man, thirsty for revenge, seeks enough magic to destroy not just the kingdom he hates, but all humanity. Yusei, a noble knight, vows to stop him. His journey with a tormented witch, a fiery prince, and some not-quite humans will test their limits, reveal a few lost mysteries, and—if they're lucky—save the world.