Floating far above the lands of the Material Plane exists O'Nyxia; the Onyxborne Kingdom.  O'Nyxia is a land defined by its many Magitech advancements,  the most famous of which being the thousands of engines that keep it afloat, and their superb medical technology.  The already long-lived Onyxborne enjoy an even longer life expectancy due to their superb Healthcare. 

The construction and quality of life tech are also quite adverbs.  While Kingdoms on the ground still build the majority of their structures from stone,  the O'Nyxian skyline is decorated with buildings with metal and glass exteriors, and self pulling carriages. 

The Palace is a Magitechnological wonder even by these standards! The Royal Family is known for finding projects that could advance O'Nyxian Society and a a result,  the Palace is always fitted with the newest, most cutting edge tech! Just this week,  in fact,  every room was fired with a device able to identify curses cast or remaining within the walls! All this to say,  however exclusive,  The Floating Kingdom is where it's at!