William de Breos rose to a position of great power and influence as a close confidant of King John, but when his wife revealed John’s greatest secret John’s revenge was brutal. William’s sons and grandson turned to Llywelyn the Great, Prince of Gwynedd to help them regain their lands. The fall of the de Breos family was the final spark that lit the fire of Magna Carta and led to the offer of the English crown to the prince of France.