a double-edged sword

something that causes both advantages and problems His great intelligence was a real double-edged sword because he never felt he could communicate with ordinary people.

Common Names:

Name	Pronounced	Usage
Benji	BEN-jee	English
Blas	BLAHS	Spanish
Luisinho	-	Portuguese
Elanor	-	Literature
Magnhildr	-	Ancient Scandinavian
Shafiq	-	Arabic