While commanding a brigade of House Deneith blademarks on a Cyran contract in 994 YK, Sigor led a small reconnaissance team across the Cyre River into Karrnath shortly before dawn on the Day of Mourning—and thus was spared the fate of the rest of the brigade, which was instantly obliterated.
Sigor has become obsessed with finding out what caused the Day of Mourning. An influential heir to House Deneith, Sigor has the resources to indulge this obsession, and he frequently leads forays into the Mournland to search for clues. He is increasingly involved with House Thuranni, hoping that the shadow marked house might know something about the Day of Mourning that it hasn’t revealed