Floating over the streets and building of Mogdúlg is Kyvax Guthor, or what outsiders simply call the Palace of Mogdúlg. It looks like a mountain on its side. The gravity plane for those inside of it is what it would be if mountain's base were pressed to the ground. As a result, if you look into it from the side, you will see guards standing perpendicular to you.
In Primordial, Kyvax means 'ruling place, throne, or palace'. The word Guthor is a word of the Giant language. In the Horgon Era, Guthor was a name given by a Cûngin-Zar cartographer for one of Molfath's mountains. At the time there was nothing really special about the mountain or the name. No children of his own, the stone giant surveyor in charge of naming places decided to honor his brother's eldest son.
In 1296, nearly three thousand years later, a perpetual storm of chaos called the Chaos Maelstrom flooded the great valley Hleittil. It left in its wake a land warped and changed. Objects where changed, creatures were changed, all in some way chaos infused. It left floating masses of rock that ignore the rule of gravity, created eddies of air that twist and turn without end, either on the ground or simply floating in the air, fires that burn without fuel, and often said to be the most eye pleasing of them all, waterfalls spilling out of what seems to be nowhere, cascading down from a cloud and even flowing upside down where they eventually fall back on themselves like a geyser.
In 1361, the ancient giant-built city Bor was destroyed by earthquakes and avalanches. Neeth-Theen moved her capital to Mogdúlg. They sent out teams to find something that would serve as the empire's new palace. A thinker chaos aberration named Ingennen found a floating mountain in the Molfath highlands. This mountain, an earth mote, proved to be much lighter than if were anchored flat on the ground. An army of slaves pulled it back to the capital where it was honeycombed out, turning it into the empire's new palace. Ingennen was given the honor of naming it. He named it Kyvax Guthor.
The chain begins to pull in the direction of a massive honeycombed rock, a mountaintop on its side. It floats, seemingly resistant to gravity.
Grarg, able to hear and see whatever Rax can, says to him, "What a sight!"
Rax looks beyond the city. Ten miles away, he sees the twisted and misshapen Molfath mountains. A few of these peaks are also on their sides, yet haven't collapsed from their own mass, as if gravity, for them, is still on the bottom of the overturned mountains. He then looks back to floating mountaintop before him as the gondola jerks to a stop. He's familiar with sky islands; they're all over the Bal-Kriav, scattered and often remote. The sale of small sky islands is one of his empire's most profitable exports. For those that can afford one, they're turned into floating fortresses or private retreats for the wealthy. But none in Azrik are this big.
Rax says to Grarg, "It would have required a hundred thousand people to move a sky island of this size."
Grarg doesn't respond. He thoughts are on the honeycombed mountain, floating above danger. If I were still a dragon, this would be my lair, he muses.
Rax enters a twisting corridor, one of dozens leading into the Palace of Mogdúlg. He sees no guards at the entry. There are also none at the hundreds of others dotting the interior of the floating mountain. "He sent his palace guards to war too?"
... Rax walks into a hall teaming with aberrations. Dozens of them are moving about aimlessly. This is a strange sight, because customarily, court protocol has you pass a series of guards, perhaps followed by a few, and enter a room with court attendees standing about, not wandering about.
- from the Godspawn Saga