Later on, the Furies had dealings with the God of War, Ares, and became ruthless under his 'guidance,' forming a plot to overtake Olympus, but finding that they were lacking in their forces they needed the perfect warrior to aid them in their attack on the Gods. The Furies set about their task, and, believing death to be too kind for one who had broken an oath to a God, transformed Aegaeon's humongous body into a stone prison for all who would dare follow his example in the future.
The first victim of the Furies was the Hecatonchires, Aegaeon, who had broken a blood oath to Zeus himself.
In a war between the astronomically large deities known as the Primordials, the madness and rage of the war took form, becoming the three guardians of honor, the Furies, who were tasked with exacting retribution onto any oath-breaker or betrayer.