Achilles

Achilles was a Greek hero who lived thousands of years ago. He was said to be the strongest and bravest warrior in the world, and no one could defeat him. However, he had a weak spot - his heel. That's where an arrow hit him and killed him. So even though he was a great warrior, he still wasn't invincible and he died because of his heel. The phrase "Achilles' heel" is still used today to describe someone's weak spot.