siren song
Something that is seductive, enticing, or appealing, but that is or may prove to be dangerous, destructive, or disastrous. Alludes to the Sirens of Greek mythology, beautiful sea creatures who lured sailors to their deaths with enchanting music and voices. Even though most people see the risks of gambling, it's possible rewards remain a siren song to many. After his hit single brought the singer overnight fame and fortune, he was quickly lured by the siren song of drugs, alcohol, and promiscuous sexual activity.