Quote Originally Posted by Kane0 View Post
Power Word: "You utter a word of power that can compel one creature you can see within range to die instantly"
Fog Cloud: "The fog is centered on a point you choose, spreading around corners and heavily obscuring the area it fills"

Foiled with a 1st level slot, Darkness would do the same with a 2nd but that's too edgy for me
Not that I'm blowing off your argument or anything, any feedback is good feedback!
To be fair, the general rule of Darkness and Fog Cloud make them affect all parties equally. Everyone is hampered by them, whereas Mirror Image only hampers others efforts against you.

*There are a couple of class features that let you see through magic darkness. Specific over general and all that.