Eris

ERIS was the goddess or personified spirit (daimona) of strife, discord, contention and rivalry. She was often portrayed, more specifically, as the daimona of the strife of war, haunting the battlefield and delighting in human bloodshed.

Because of Eris' disagreeable nature she was the only goddess not to be invited to the wedding of Peleus and Thetis. When she turned up anyway and was refused admittance, she raged and threw a golden apple amongst the goddesses inscribed "To the fairest." Three laid claim to it--Hera, Aphrodite and Athena--and in their rivalry brought about the events leading up to the Trojan War.

Eris was closely identified with the war-goddess Enyo. Homer uses the names interchangeably. Her Roman name was Discordia.