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
Sarina	-	English (Modern)
ŞErİFe	-	Turkish
Florus	-	Ancient Roman
Amand	['æmənd]
SÓLveig	-	Ancient Scandinavian, Icelandic
Charlotta	shah-LOT-ah	Swedish