Hello! This is my first contest entry, and I have been working on this map for only three days so far. I have based the name and map from the Undead faction's Black Citadel in Warcraft III, so idea goes to Blizzard Entertainment. However, I plan to add a different architecture and a whole city (this is just the gateway entrance for military and first-line defence). Also, if I have enough time, I will put in a special surprise sculpture that would take me at least a week to finish it - as its final touch. Map will be uploaded before inserting the sculpture.

STORY - The Nether Dimension of Planet Xenos was wrought like the Overworld of Planet Minecraft - Warring empires and mythical underground creatures that shaped the lore of Subterranean Xenos. None of the overworld species would have survived this dark realm.
There existed a powerful Empire known as the Raeviers, a combination of every undead and living creature in that subworld. They held up their Red Flags and controlled the power of airships to explore the depths of the Nether. They worshiped an ancient deity known to have visited all the creations in the universe, yet they are convinced He was the one who made the universe, yet the truth was never officially decided.
The Raeviers consisted of an organised military force, divided into three ranks: The Curatrix, The Chivaliers and the Battalion. The Chivaliers mounted horses and great creatures that charge ahead in battle, as well as piloting military airships across the Nether. The Battalion are the main body of the advance, possessing strength in numbers and co-operation. The Curatrix, however, are highly skilled specialists that reside in the Keep, who remain in the Battalion and support the attack by diminishing great numbers of adversaries in struggle. These ranks have protected the existence of the Raeviers and its citizens.
The Raeviers however, have civilised thinking, and organised everything down to avoid corruption. In the past, many people falsely declared themselves official residents of the Raeviers' Citadel, and caused many crimes and assassinations. The Council at the keep declared each citizen identifies himself with a card of proof, abbreviated to the phrase, "ID". The citadel now experiences minimal corruption and overthrow of its existence.
Raevier citizens, however, were not very fond of their living in the past, until met with business and activities. The civilisation of the Citadel grew, now with controlling sewage, more sufficient resident spacing, as if the Empire favoured its citizens more than its military power.
However, some Raevier citizens were not content with their new conditions, whereas foreigners desired to belong to the Citadel. Therefore, air travel was made possible with the Aeroscraper and Lavaport, These methods of travel suited more to the people than the military, hence became the largest business in the nation. Conveniently, the current tallest residential skyscraper remained beside it as a part of the aeroport, for newcomers or jobseekers.
For those who have remained, they gather together at the centre at significant events, upon a shining initial upon the square, labelling the patriotism of the Raevier Empire. There the people commune, otherwise crowd the area for an announcement, celebration or capital punishment.
Behind the square lies the entrance to the Incisive Mountain Range, home to the caverns of Gold, Chalcocite, Felsic lava and rarely Diamonds. Here is where the Empire's massive labour industry takes place, and where most workers reside for the majority of their skills and finance.
(Will continue at next update, stay tuned!)

Additional Notes

Well my computer is three years old, is a laptop with adequate graphics, and cannot friggin bear any shader mod I install on minecraft, the textures get glitchy and really slows the entire system down. I'm gonna have to buy a new computer... Sorry if the screenshots are only vanilla :/

Apparently I can't upload PNG images, since it stalls me off, until I use JPG, then it starts working.