Here's a quick character run-down of what I'm bringing:
Skulmar, Captain of the Dead Host:
Former servant of the Witch King, raised to Lieutenant of Morcar's combined armies after his master's defeat at the hands of the Emperor's Heroes. Following Morcar's downfall Skulmar fled with the help of his aide Milnik the dwarf. The pair have been closeted in the Ash Ridge mountains ever since, plotting to bring the Orcs, Goblins, Fimir and Undead back into league to serve the dark masters of Chaos once more. They have a contingent of Morcar's scattered Doomguard with them.
Grawshak, Orc Shaman of the Northern Tribes:
Grawshak hails from the mountains to the north of the Dark Lands. Here tribes were once united under Morcar's leadership, but after his fall such alliances proved frail and the diverse greenskins went back to fighting amongst themselves. Grawshak himself was badly injured when the master of dark magic was defeated and his tribe cast him out to live the life of a hermit high in the desolate peaks. When whispers of Morcar's return began to spread the shaman was sought out by an ambitious Orc chieftain who desired to see if such rumours were true. Together they have come to pledge themselves once more to the service of Morcar.
Zanrath the High Mage:
Formerly a highly regarded member of the colleges, Zanrath swore himself to Morcar's cause in secret. When the Emperor's heroes exposed his treachery he was forced into hiding where he has remained. One night Morcar visited him in a dream and told him to prepare for his master's coming once more.
Fanrax the Malicious:
Fanrax was born the only son of an Arabyan prince. His father was assassinated by a rival noble and he was cast from the city. Vowing revenge on those who had done wrong to him, he travelled northwards to the Old World where he was enlisted by one of Morcar's lieutenants. He proved an adept Necromancer, animated thousands of corpses to join Morcar's legions. He eventually achieved recognition from his master when he turned the full force of his newly-honed magic upon the city from which he had been exiled, raising it to the ground and animating its inhabitants into the service of Morcar. Fanrax has cheated death many times and now his shadow rises once more, an echo of the stirrings of his master's spirit.
Boroush, the Storm Mage:
Boroush studied under Gawaint, the ancient weather-wizard. Secretly he plotted to supplant his mentor, and one night he stole books of forbidden lore from the old man's library. Reading through them he learned everything he needed to know to bind the storms to his command and he violently assumed control of Gawaint's tower, killing the old man and filling the place full of the servants of Chaos. However, the process aged Boroush, withering him as he cast. He left the tower that night, a wizened figure clutching the volumes in his withered hands. He knelt at Morcar's feet, begging him to lay a charm of immortality upon him to halt the ageing. Morcar agreed, so binding him into everlasting service.
Clan Maer:
The Fimir of Clan Maer come from an island in the Sea of Claws. They are ruled over by Maire Scathach, the clan Meargh, who struggles constantly to control the squabbling nobles in her charge. Three of these nobles, Scea-Zok the slavechief, Scea-Shille the holdchief and Scea-Rung the warchief, currently control most of the clan's allegiances and are always vying against one another for power. In an effort to force their cooperation Maire Scathach has called upon her dark gods to grant a blessing upon one of her loyal Fianna Fimm, transforming him into a huge creature against which the nobles are afraid to contend. Each of the nobles has their own Dirach wizard in attendance and The Drui, Scathach's priesthood of Balor. The clan are accompanied by units from the Atrebodil tribe which reveres the Fimir as warrior-gods. They also have the support of the Kelpies and Woldlice, creatures of the marshes which have allied with the Fimir for mutual benefit.