Far away from the Academy, a city sprawled from the base of a colossal mountain upward. Houses began from the ground and crept upward like ivy on the mountain's massive back.The mountain peak pierced the heavens, vanishing into the clouds.At the middle of the mountain, a castle made of jet-black obsidian rose like a jagged crown. Its smooth, reflective surface gleamed under the sunlight, as if carved from polished darkness.The structure climbed skyward, almost reaching the summit. It looked like a dragon clinging to the mountain, eternally trying to ascend.This was the main city of Terravyrn—and the Earth Dragon Castle, seat of the Terravyrn Clan.