Hey, in Volo’s Guide to Monsters, do the mind flayer psion’s spells replace the normal mind flayer’s innate spells? The wording is confusing. It is indeed presented a little strangely, but I think it's supposed to be in addition to their standard innate spells.

They're gaining abilities, and that fits with the Mind Flayer Arcanist sidebar in the MM.

— Dan Dillon (@Dan_Dillon_1) December 18, 2019