Let's do this. If we've got a Catalan Magocracy, I can't see why we can't have a Russian NECROCACY! Also I've been reading too much warhammer fluff.
The Dominions of Vladmir B'smirtniy, Necrocrat of the Dead, Raiser of the Shambling Hordes, Master of Skeletons, Emperor of the Darkness, Dread Tyrant of the Blackest Abysses, Herald of the End Times
or
The Necrocracy
Once, Vladimir B'smirtniy was but a man, going by the name of Waldemar Ulfrikssen. Clever and well read, he was but a humble archeologist in Stafia. He specialised in the study of the Ancient Rus, who once ruled a great empire across Eastern Europe. Legends and folk tales of the Rus spoke of vast armies, of Dark Sorceror-Emperors who ruled over vast dominions of horror. Waldemar dismissed such claims as superstition - truly such an empire would never fall! However, he dedicated his life to searching for relics of the Ancient Rus in order to better understand the history of the region.
Through his research, he came to find that the Rus were obsessed with finding the secret to eternal life. Rus palaces were full of varying alchemy labs and other such devices, while the quest for eternal life was a regular theme in their art and literature. Furthermore, death seemed to hold great importance to them - banners and wall-carvings depicted vast amount of skeletons, and bones were scattered all over the palace in seemingly haphazard ways. Confused by this, Waldemar explored further, travelling south to the ruined city of Volgograd. There, his excavations unearthed something new.
Digging under the city, the archeologist came across a vast system of caves. Etched into the walls were similar depictions of death as found in the palaces he had unearthed, and the haphazard skeletons were everywhere. Thinking he may have found the secret, Waldemar travelled further, until he reached a large cavern which led nowhere. There he found Koschei B'smirtniy.
Koschei was the skeletal remains of the man who was once the greatest Sorceror-Emperor of the Rus. The Sorceror-Emperors wielded great magics and powers of necromancy, able to cause the dead to rise from the grave and do their master's bidding. Koschei was the greatest of these, and all the world trembled under his dark arts. However, the secrets to eternal life evaded him - he became obsessed with finding it, and as he grew older and his body began to waste away he only became more fervent. Eventually, he made a desperate pact with Dark Energies and Powers from Beyond - to grant him eternal life and great magical power, in exchange for the sacrifice of a million innocents. Koschei took the deal willingly and immediately, however, eternal life was not eternal youth - instantly his flesh sloughed off his body and he became but an animated skeleton, with great strength and power but unable to enjoy the pleasures of the flesh no more. He was furious, by the Dark Powers threatened to remove his eternal life if the pact was not completed.
Koschei rode forth at the head of his armies, both skeletal and living, to slay a million innocents in the name of his immortality. The dead armies of Volgograd slew thousands upon thousands, pillaging all in their wake. The civilised men of the West grew afraid as the Dead Hordes penetrated into their lands, but they could not stand against Koschei, now known as B'smirtniy or the Undying, and his dread strength. However, one hero stood against the tyranny. Without the backing of a mighty army or a strong lord, he rode out into the Rus Domains, seeking to end Koschei and his tyrannical aims. The First Hero was strong and brave, and did many great deeds on his way, and thus men and women flocked to him. He gained the allegiance of the Cunning Archer, who's skills with the bow were unparalleled, the Shieldmaiden, who stood strong against the undead hordes for 100 days and a hundred nights until the First Hero came upon her and slew the skeletons, the Healer, who knew many salves and cures and founded the practice of medicine in Europe, and the Magician, who gave to the world of men the use of magic for good ends.
Together, the First Heroes burst into the Chambers of Volgograd, as Koschei had just made his 999,999'th sacrifice. They smote him down, crushing his physical body, and his armies collapsed wherever they were. The Rus Empire had fallen, and was erased from history. Koschei, with eternal life but no more power, for his millionth sacrifice was never completed, was cast down into the blackest pits below Volgograd, where he waited for almost an eternity.
However, when Waldemar came upon him, Koschei explained everything to him. Waldemar was swayed by Koschei's black charisma, and using the last of his powers, Koschei melded them together. Waldemar Viktossen was no more - now he was Vladimir B'smirtniy, Vladimir the Undying. He rose to the surface, and slew his archeological team with his new powers, thus completing the millionth sacrifice and becoming the Undying One.
Vladimir then travelled to Catalonia, learning magic at the knee of its greatest. With Koschei's knowledge and voice always at the back of his mind, he excelled. However, he fought frequently with his instructors, who tried to teach him to use his magic for good and not personal gain. Vladimir ignored them, and focused on learning the Dark Arts of Necromancy under Koschei's tutelage. Eventually, with his powers growing strong, he ventured forth into Siberia, where he slaughtered many and built an army with their bones. Rash and egotistical, Vladimir invaded China with his undead army, not heeding the warnings of Koschei.
Despite the power of the Armies of the Undying One, after a long campaign in Mongolia the necromancer was routed and his hordes destroyed. Koschei fled China, with the Imperial cavalry hot on his heels, back into the wilderness of Siberia. Now alone and without his armies, and forced to flee from civilisation lest he be shot and banished, he roamed the ruins of the Old Rus, seeking wisdom and knowledge even Koschei had forgotten or never known. After thirty years of wandering, Vladimir has learned much and is at the peak of his powers. He returns to the old seat of Volgograd, where he has built up a great army both living and dead from the Rus peasants. The blackness of death holds no fears to him - now it is the time of reckoning, and Vladimir B'smirtniy will unleash his vengeance upon the Living.
I suppose this implicitly supports China, Catalonia, and Stafia