Nemesis

Greek

A rival or force that causes someone's downfall.

Nemesis was the Greek goddess of retribution against those who succumbed to hubris. She balanced the cosmic scales by punishing the proud.

Now means an arch-rival or unbeatable opponent. Comic books and sports commentary rely on it heavily.

Frequency

Greek Mythology

Self-confidence so excessive it invites destruction.

Psychology

A recurring template — character, image, story — held to be shared across cultures.