Godfather

The Godfather was the leader of a duergar clan in Gracklstugh. It was unknown if he was a real person or fictional character, but part of his story was immortalized in story "The Daring Duergar" in the book Fables of Faerûn.

"The lesson is complete."

History
One day, a young duergar by the name of Shull reached out to the Godfather, eager to develop his psionic abilities. The Godfather directed the power-hungry youth to seek out the mind flayer known as Ir, far from their home city.

Some time later, Shull returned to the Godfather, armed with the ability to destroy a single mind with a mere command word. Eager to kill the Godfather and seize his power for himself, Shull demonstrated his newfound ability, and immediately exploded his own skull. The Godfather had completed his lesson to the young, disloyal duergar.