There is a new page: the Pantheon.
All twelve of them, in the order you meet them. Four Spawn, four Heralds, four Ancients, each with its drawing, its epithet, the Force it binds while it stands, and the numbers you are actually up against.
The page is built out of the game rather than written alongside it. The names, tiers, Forces and stats come from the engine, and the artwork comes from the same object the board draws its enemy from. Neither half can drift from what you actually meet, which matters more on this page than on any other: a bestiary that lies about a number is worse than no bestiary.
At the foot of it, set apart, is the Empyrean. It is a spoiler if you have never played a campaign, so it is not mixed in with the twelve, but it is there, and all four of its faces are there with it.
Terror shipped a while ago and, embarrassingly, appeared nowhere a player could read about it. The Tomes now have a section on it, the Lexicon has the five words it introduced, and the Lore has something to say about what the twelve are standing on.