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
ZoË	ZO-ee (English)	Dutch, English
Adetokunbo	-	Western African, Yoruba
Farid	-	Arabic, Iranian, Urdu, Azerbaijani
Chimo	CHEE-mo (Spanish)	Catalan, Spanish
Launce	-	Literature
WarcisŁAw	-	Polish (Archaic)