Seven Kingdoms: Seowyn's Crossing
Sheraku’ul was an Illithid Ardent who came from the Far Realm and made his headquarters in the dungeons of the Fortress of Grandor. He was summoning an army of Aberrations with intent to open a rift to the Far Realm and then flood Tol with madness. His schemes were foiled by the Gold Dragon Company, but they had to sacrifice half their number to stop him. The surviving members retired from adventuring.