The Castle in the Clouds is an area only accessible in the third floor of Daunting Mountain with the use of an item called Angel Wings. The Angel Wings are only found as a drop item of Rico Jr. In the Castle of the Clouds, you are able to find a large variety of different items, money and even equipment, not to mention battle magic as well. Most importantly, the Hero Licence is only found there on an Item Space or White Loot Space.