Malefic in a sentence as an adjective

Low IQ people in low responsibility positions don’t pose much risk, I’d actually think high IQ in highly responsible positions may pose a higher risk: think of hiring a high IQ malefic narcissist who would ruin your business just for fun

In conclusion, regarding obscurity, the beneficial effect of an extra security layer is only greater than the potential malefic effect of hiding security problems if the entities behind it, including the auditor, are competent and trustworthy. As a rule of thumb it should be avoided or have its bad side mitigated by independent security audits.

It's usually a tool to mount some war against a thorn jabbed in the speaker's side that they cannot articulate in polite company, so a conspiracy group is the next best place to hob nob and chin wag about this malefic thorn in their side, poisoning their thoughts and feelings and yet difficult to discuss without putting everybody to sleep with yet another impossible to solve fear. The changes in view I've seen is when the underlying need to quell a fear has been met, the story they discuss openly tends to change a bit.

Malefic definitions

adjective

having or exerting a malignant influence; "malevolent stars"; "a malefic force"

See also: malevolent malign evil