Sigmar was born in Arabel the second son of a city guard named Arnolf Amberlin. His education was spartan whithout any room for things like childplay or fun, his mother was religious and taught him the faith of Helm the Vigilant.

When time had come to choose a job Sigmar signed into the army in order to serve his beloved country.The army was not what he expected, he was suprised of the ambiant mediocrity among its ranks and did its best to get a special assignment.

Eventually, he was detected by an intelligence officer and recruited in a counterspying service in charge of neutralizing zhentarim agents.He was judged capable after some tests and began doing some minor missions.

Prooving himself worthy he was assigned on an important mission including the neutralization of an inflitrated agent among the war wizards of Cormyr.

Alas he was betrayed by a double agent and the mission was an outstanding failure, not only the infiltrated agent escaped but he traped him into a magical vortex which sent him into the underdark.He also revealed to him in a mad soliloquy, sure that he would meet certain death, that he was victim of a betrayal coming from the ranks of the cormyrian army !

Sigmar awakened in a gloomy and dark tunnel of the underdark, he was alone, abandoned, bitter about the betrayal and how things turned more complicated than he espected.Learning from this lesson, he strived to survive in this new harsh environment.

His wandering made him cross a patrol from Sanctuary where he was able to find some safety...He was surprised about the complexity of the organisation of this microsociety, may be this city would have more to offer than only a chance to survive, after all..