Yak

Yak (ヤク, yak), also known as Wenchang's Flying Frontier (文昌の 飛行 フロンティア, bunakirano hikou furontia) is a floating city-state that is located approximately 90 km above the capital of Fiore, Crocus. The city-state consists of a series of over 100 islands that are suspended into the mesosphere by magical energy, similar to the islands located in the parallel world of Edolas. Normally, the mesosphere would be incapable of supporting lives because of the thin oxygen levels and temperatures well below freezing, but, as mentioned before, a thick layer of magical energy (the same that holds the islands up) surrounds the entirety of the city-state in a protective sphere; this natural field also is able to protect against nearly all harmful projectiles launched by enemies... unless they are made of Wolfrichterite.

Government and Religion
The city-state of Yak is dominated by the Church of Xevelia, who run a ecclesiastical goverment. Meaning, that the entire city-state is run by a clergy of elite priests, priestesses, ministers, and pastors who ultimately decide everything that goes on inside of the city-state. While not all citizens are necessarily required to believe in the Xevelian religion, anyone who does not is a definite minority and is generally shunned by most, as they make up of .5% of the entire population. It is for this reason that some see Yak as a religious paradise, and the citizens that live their consider Yak to be the closest place to heaven one can be, without actually dying.