I don't own anything GW has the rights to. I thought of this tale after reading some of the stuff on the Noscan tribes in Fantasy. This is based in the time that the Slaves to Darkness series occur.
Crimson Gold

Chapter One: Taint

The longship rode in using the fog to conceal their attack. This was no ordinary raid though. Umnwegtz the Azacjaerlings shaman had predicted that there was one who the Gods smiled upon in the large port city of Marineburg.

"If you are wrong shaman, and there is no child as you described, I will sacrifice your soul to the God personally". The tribe's chief, Ostrenjing, had been threatening his advisor this way for the past week that they had been on this voyage.

"I assure you, the Gods do not lie to the blessed. The child will be there just as I described, hidden and with the mark of the daemon upon his back." replied the shaman. "We will see if we are as truly as blessed as you say. The Gods will make sure of that."

While the bulk of the fleet away to fight the norse raiders, Marienburg was relatively vulnerable. With the heavy fog if there were any invaders they would be able to pass through undetected, if they could actually navigate in this evil mist. One couple was making its way home to their newborn. What they had gone out for on a night such as this was truly dear to them- a way to cleanse their child. They had to keep him away from all others because of the mark on his back, an eight-sided star with bazaar runes under them. They hoped that the contents of the bag they had just purchased would keep this taint in there child away and make him accepted. Then there was the sound of heavy footfalls and all hell broke lose.

A babe cried as blood spilled all around. The child was silenced by the presence of a large man. Norscan howls of glee and a shifting of men soon followed.

"S'kgan khar, S'kgan nragle, S'kgan sleentch, S'kgan teezntxt," muttered the shaman as he approached the babe under a mesh of blankets in a basket. He then gave this child a golden medallion of the Four soaked in the blood of the fallen. "See his back and do you doubt me now? It is covered in the dark tongue and the holy star. He is truly our champion." "We must leave or risk the wrath of the fleet of the southerners" implored an eager young warrior named Twrenneth. "Worry not; we leave no with the blessings of the Gods to guide our sails."