Dictated to Scribe Yanthus by Enver Gortash
The Grand Design is the mind flayers' species-wide ambition to return to the days of their conquering greatness through an act of sudden mass ceremorphosis, giving the elder brain in overall command an implacable army of illithid slave warriors with which to defeat all their old enemies, human and humanoid, githyanki and ulitharid.
Of course, this is delusional madness, megalomania on a cosmic scale. And I know just how to turn it to our purposes. We're going to help the mind flayers enact their Grand Design, but only in the way that suits us. The illithids shall have their crusade to enslave, but they will be acting in turn as OUR slaves, and we shall determine the how, when, and where of their great illithid outbreak.
To be precise, I, Gortash, will determine these things, as commanding the Grand Design is clearly a Banite task.
Rarity: Common
Weight: 0.5 kg / 1 lb
Price: 14 gp 
Spoiler warning! This text might contain spoilers about the story of Baldur's Gate 3.