Athena

It is said about... Athena

"In fear the unborn Athena could become a more powerful god than her father 
Zeus himself,
He swallowes the pregnant mother Metis. Smith-God Hephaistos released Athena 
by chopping off Zeus head
with an axe to become the goddess of wisdom and art, as well as the Greek 
goddness of war and peace
With Medusas chopped-off head, strapped to her battle shield, Athena was 
undefeatable"