He utilized the spoil of his best-known exploit to defeat Phineas; that exploit began as a fool's errand for Acrisius.
This person is the protector against the king of Seriphus for his mother, who has been banished from the realm of his grandfather, Acrisius. He had to bargain with Cepheus to wed his beloved, since she was destined to be sacrificed to a sea monster. He utilized the spoil of his best-known exploit to defeat Phineas; that exploit began as a fool's errand for Acrisius. For ten points, name this hero who enlisted the aid of the Graeae to slay the mortal Gorgon, Medusa.
This person is the protector against the king of Seriphus for his mother, who has been banished from the realm of his grandfather, Acrisius.
{Perseus}