Yeah dude everyone's first couple experiences are with brains with legs hahahaha. Give me a break dude. This is fringe Spelljammer stuff.
Sometimes when I'm deeply ignorant of a subject, I just start laughing maniacally.
So we're in the same boat, there.
Intellect devourers came out in the very FIRST Monster Manual for D&D, way back in 1977. Long before Spelljammer was even a thing. It's a core D&D monster.
