Eris
Ἔρις · Roman 디스코르디아 (Discordia)
The goddess of discord who started a war with a single apple.
Left off the guest list for the wedding of Peleus and Thetis, she tossed in a golden apple inscribed "For the fairest" and walked away.
Hera, Athena, and Aphrodite each claimed it, and Paris, chosen as judge, picked Aphrodite.
His reward was Helen — and with her, the Trojan War began. One apple became a ten-year war.
SourcesHesiod, Theogony