Question

DEVIL IN DISGUISE

Accepted Answer

Something or someone that appears to be good, useful, or benevolent, but that in reality proves to be the opposite.

When I first met my ex-husband, I thought he was the nicest, most generous man alive, but he turned out to be the devil in disguise.

The new cancer-treating drug held great promise, but it proved a devil in disguise when the true scale of its side effects became known.

Front	DEVIL IN DISGUISE
Back	Something or someone that appears to be good, useful, or benevolent, but that in reality proves to be the opposite. When I first met my ex-husband, I thought he was the nicest, most generous man alive, but he turned out to be the devil in disguise. The new cancer-treating drug held great promise, but it proved a devil in disguise when the true scale of its side effects became known.