two-edged sword

and double-edged sword

Fig. something that offers both a good and bad consequence. The ability to get your insurance to pay for it is a double-edged sword. They may raise your rates. Her authority in the company is a two-edged sword. She makes more enemies than allies.

Common Names:

Name	Pronounced	Usage
Mitsuko	mee-tsoo-ko	Japanese
Sarkis	-	Armenian
Dannie	DAN-ee	English
AnnagÜL	-	Turkmen
Berta	BER-tah (Polish, German, Italian)	Polish, Czech, Hungarian, German, Spanish, Catalan, Italian, Slovene
Krastio	-	Bulgarian