Final answer:
The King of Corinth makes a bad mistake when he corrupts the city and betrothed woman of Thamyris, leading to tragic consequences.
Step-by-step explanation:
In Greek mythology, there is no specific story or character involving a King of Corinth corrupting the city and betrothed woman of Thamyris. Each myth has its own unique narrative and set of characters, so it's important to have accurate information when discussing specific myths or stories.
It's possible that the statement you provided is either from a different myth or a fictional interpretation of Greek mythology. It's always important to verify information and ensure accuracy when discussing mythology or any other topic.