The entire premise here is that somehow Wizards controls the lore in my game. While that happens when I play/run AL, there's not a snowball's chance in Avernus of that being the case for my own game.
For those who survive the experience, the contents will actually be a recipe book[/U].

My actual Secret Plans will be kept in my personal chambers and will be labelled something like Garbage Disposal Proposals.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.