Nagashizzar

Nagashizzar's Location on map.

AKA Glory of Nagash in Nehekharan, The Cursed Pit by the Skaven, is Nagash's second base of operation (the first being the Black Pyramid) after he was chased out of Nehekhara from his first defeat. Located besides the Sour Sea, it is a terrifying mega fortress that rivals Drachy's castle with many edgy skull sculpture, towers, laboratories, warpstone mining deposit, and an extremely sturdy gate, all personally designed by Nagash himself, using his knowledge of 40 years worth of Nehekharan architectural studies (meaning the fortress itself is a goddamn masterpiece). The said fortress was originally carved out of a mountain, created by a gigantic fuckoff warpstone meteor crushing down the earth. Skaven had tried to fight Nagash for it, only to end the conflict in a draw, then took it back after they had a certain fallen king to do their dirty work. After a long ass time without Nagash's presence, the damned place's warpstone is completely mined out by the Skaven of the Clan Rikek. However, the said clan were destroyed in a single night by Nagash's second return. After Sigmar kicked Nagash's arse, the said bone daddy was regenerated again at Nagashizzar, only this time he is so weakened that he is but a husk sitting on his throne, and all he can do was ordering his undead soldier around the fortress to ensure Skaven does not disturb his eternal nap time.

History

Way before the coming of Nagash and the warpstone meteor, it was ruled by a tribe of barbarian. Since the meteor had not arrived, the nearby lake hasn't been contaminated, so it wasn't called The Sour Sea (note: it's former name was not mentioned), and its nearby Sea, the Bitter Sea was called the Crystal Sea formerly.

After the meteor hit, the humans living there learned to harness the stone's power and used it to dominate the nearby tribe and formed a Theocratic kingdom based on the worship of the stone. In those days, they were known as the Yaghur (aka the faithful in their language). Just like how every powerful people became corrupted with power, its nobles went tyrannical and made their people to rebel against them. The Yaghur were overthrown when an exiled prince returned and bought the teachings of Malakh, the four face god (one of the many obvious-undivided-puppet-account of the big four, that or Be'lakor was bored since Malakh is also called the Dark One) to the already chaotic populace. After all Yaghur nobles were killed, the prince sealed the mountain entrance to the warpstone meteor and led many of his followers northwards to the Plain of Bones. Unsurprisingly, Malakh turned out to be just as bad and split the society into two groups: The original Yaghur who occupied the old location by the mountain, The Forsaken, aka Malakh's followers who occupied in the mountain fortress north.

The Forsaken warrior were similar to the Warriors of Chaos: wearing heavy armor while wielding assorted axe weapons, and had superior physique than a Yaghur warrior. Not to mentioned having access to the use of magic thanks to the 3 sorcerers leading their army.

Yaghur were but a primitive tribe of barbarians with deformed appearances (due to consuming anything coming out of their nearby warpstone contaminated lake: The Sour Sea). Having already torned apart by civil wars, they've lost many technology and thus no longer had the abilities to forge war gears (only their chieftain were better armed than their low tier warriors, yet those were salvaged old gears from their glory's past). They still had the capability and the knowledge to control warpstones, and those who can are the High Priests. These priests rest at the top of their society, being the only group of human that were not mutated due to their excellent control of the stones, which they use its power to perform funerals and other spiritual voodoo mumbo jumbo to fool the populace, so long they gets to live comfortably like the greedy fucks they are. Their warriors were also so stupid that Nagash of all people looked down on them not even worthy to be enslaved by Nehekharan, and yet Nagash were also surprised they could survived against the Forsaken for so long.

The Coming of Nagash

After Nagash's first defeat, he discovered the warpstone. This made him want more of it which led him to where Yaghur lives. Like an isekai mc, Nagash infiltrate the locals in orders to snooping for their strength and weakness. When the time is right, Nagash dug out the mountain's warpstone and use its power to conquered the local tribe with his undeads and magic. In an accident, Nagash befriend a young acolyte named Hathurk, who mistook Nagash as the same mountain god their people had worshiped long ago. With Hathurk's help, Nagash arrived to where the village chieftains are, intimidated them into negotiate with them by sitting on top of a palanquin littered with corpses of the local religious group. Nagash also ensured their loyalty by promising them the secret of the "Forsaken's prowess".

The actual secret was the refining technology and unit tactic use by the Nehekharan, but Nagash knew the Yaghur were too stupid and incompetent to appreciate them that bone daddy just straight up telling them to eat each others, and the Yaghur were stupid enough to follow.

The war with the Forsaken was long and tedious, which took 247 years to end. Nagash didn't spent all that time on conquest alone however, for Nagashizzar was also in construction during that time. The fortress itself was so terrified that it made even the battle hardened Forsakens to screaming in terror.

Yaghur during those time had been practicing cannibalism that they slowly devolved into Ghouls (ha, get it? Ya"ghur"?), pale creatures who feast on human flesh. They now live in their own nest near Nagashizzar.

Skaven Invasion

One of the Nagash's traitorous lieutenant: formerly the sorcerer of Forsaken by the name Akatha called the Skaven to the damned place with the promise of warpstones. Although the fortress is tough and terrifying, it is not digging proof, and the Skaven were able to invade the fortress using tunnels. If Nagash's army were proven to be too tough for the Skaven, they could just cut of Nagash's manpower by raiding the ghoul nest nearby, or Forsaken's village. In other words, the Skaven were a pain to deal with for Nagash and he had used many tricks and magic as he could to deal with the Skavens, be it constructs of war or poison gas. Still, Nagash managed win a crucial battle that not only killed Akatha, but also forced the Skaven to stop sending reinforcement to the damned place. Both side were deplete of resource at this point. Nagash lacks warpstones and manpower, whereas the Skaven warlord in charge also lacking the aforementioned resources and feared his possible disposal by assassins sent by the council. In desperation , both side called a truce and began an unhealthy partnership of trading.

Nehekhara Invasion

Having nurse back to full strength with a couple gears forged to further strengthen himself to unbelievable status, Nagash was preparing for his return to Nehekhara and took back his throne. Since he'll need acting commanders in his invasion, he resurrect Arkhan the Black back to his service. As for other commanders, Nagash had chose a nerdy vampire called W'soran and his vampire groupie, who were just so happened to flee to the damn place from their defeat in Lahmia and pledged their servitude to Nagash.

Unfortunately, the invasion was a massive failure and made Nagash tantrum for 7 days 7 nights, trembling the damn place with quakes and green light. Nagash had enough and decided to plague the Nehekharans by contaminate their water source, and turned the entirely half of fucking continent into a wasteland. He succeed this time, and sent his army to killed off the rest of Nehekharan and capture their current king: Alcadizzar.

Nagash's first death & Tomb Kings

Nagash used the king as some kind of magic conduit in order to enslave the souls of every Nehekharans and use them as some kind of massive as fuck army to conquered the world....which didn't worked out for the Skavens and a vengeful spirit named Neferem help Alcadizzar and to take down Nagash. With Nagash's death, the ancient king that were awoke by the ritual became the Tomb Kings and Alcadizzar wandered off Nagshizzar with Nagash's head and crown to never seen again. Skaven immediately rose up, took the fortress and its warpstones as their own and chased out Nagash's followers like W'soran.