Allusions to Greek Mythology

To have a tragic weakness.

• Achilles's Heel
• Herculean  Effort
• Medusa
• Titan

To play matchmaker

• Cupid
• A Siren's Song
• Achilles's Heel
• Titan

A temptation that is hard to resist, but may lead to bad consequences. 

• Cupid
• If looks could kill
• A Siren's Song
• Trojan Horse

To constantly complain to another person.

• The Midas Touch
• Trojan Horse
• If looks could kill
• To  Harp

To have good fortune.

• The Midas Touch
• To Harp
• Achilles's Heel
• Pandora's Box

Burdened by many problems.

• Bearing the weight of the world
• If looks could kill
• Medusa
• Trojan Horse

Something that isn't what it seems to be.

• Trojan Horse
• Achilles's Heel
• The Midas Touch
• To Harp

To do something that causes more problems.

• Herculean Effort
• Pandora's Box
• Titan
• Trojan Horse

Requiring tremendous effort and strength.

• Herculean Effort
• Pandora's Box
• Bearing the weight of the world
• Trojan Horse

Describing a  mean look.

• If looks could kill
• Medusa
• Titan
• Cupid