BookTenTiger
He / Him
I think Mind flayer vs Drow is a really interesting way to examine this issue.Then how do they self-sustain? Consuming the brains of other intelligent creatures - which has been part of their lore since forever - sure sounds like eating to me.
How do they communicate? (and before you answer "psionically", mind-to-mind communication is just the same as talking only without the sound parts and much faster/more efficient).
How do they reproduce? They have to reproduce somehow if only to sustain their species.
On reproduction do they germinate/appear as fully mature mindflayers with all their abilities? And if yes, after that do they age; and do/can they eventually potentially die of old age? A no to the first question and-or a yes to the second immediately confirms a biological maturation process.
That's because I didn't.
Yes they're alien, even to the fantasy settings. That doesn't mean they're necessarily all that different in how they function biologically; unlike, say, demons whose "life" cycle is vastly different from anything mortal.
side note: I know it's turned into a strange discussion when I find myself defending mindflayers...
At what point is a humanoidish monster so alien that it feels okay to label it as evil?
My gut tells me Mind flayer is over the line into the "okay to label as evil" zone. You are right that it eats and speaks and reproduces. If this were Star Trek there would be really fascinating episodes about the rights of Mind Flayers to use other people as hosts for their young.
In the genre of D&D though, I feel like they are alien enough to be separate from other humanoids like Drow and Orcs. But again, that's gut level.
I do think it would be a lot more interesting if instead of Alignment they had Motivations: hunger, domination, power describes a Mind Flayer to me a lot better than "evil."