in Volo’s, Mind Flayer’s Lair section, I can’t find the “Brain Chamber” (p.77) on the map (p.79). There’s an “Elder Brain Chamber”, but there’s no description for it. Where’s the Brain Chamber (as described), on the map? No book with me – but might refer to elder brain chamber OR the colony depicted on the map happens to not have a brain chamber

— Mike Mearls (@mikemearls) May 30, 2018