two-edged sword
noun1
Synonym of double-edged sword: a benefit that is also a liability.
2
Used other than figuratively or idiomatically: see two, edged, sword.
- For the word of God is quicke and powerfull, and sharper then any two edged sword, pearcing euen to the diuiding asunder of soule and spirit, and of the ioynts and marrowe, and is a discerner of the thoughts and intents of the heart.1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], →OCLC, Hebrews 4:12: