Big Mac wrote:That's interesting. Is there any mention of how Mordenkainen travels to and from Nentir Vale?
Nope. He even destroyed the book (the in-universe Magnificent Emporium
) after he wrote it, because in the end he considered the knowledge he compiled too dangerous. As I said before, the Magnificent Emporium
had info about magic items of many worlds, not just Nerath (the real life sourcebook only focus in the 4e core world, though. So, we have many unrelated items, and many others specifically related to the empires of Arkhosia, Bael Turath and Nerath, and the Nentir Vale of the "current years").
We do have a few excerpts of the original book thanks to one of his ex-apprentices, Qort (the few pages and paragraphs published in the 4e sourcebook), who published them without Mordenkainen's permission, and risking his life in doing so (so, perhaps he may be dead right now. Or least forced to hide from Mordenkainen).
We do know, however, that Inverness Castle exists in Oerth and in the Nentir Vale at the same time. The adventure "The March of the Phantom Brigade
", that is set in the Nentir Vale, specifically states that Inverness Castle came to the Vale from another world. It just appeared from nothingness one night. So, we know that Nentir Vale is equivalent to whatever region Inverness Castle lies in Oerth.
Big Mac wrote:Is there anything in the book that could lock the Greyhawk calendar dates and Nentir Vale calendar dates together?
Besides the fact that Mordenkainen specifically says that he "use an orb made by Otiluke. I miss his whimsy.
" (page 45), there are no dates for when Mordenkainen wrote the Magnificent Emporium
. However, that means the book was written some time after the Greyhawk Wars (as Otiluke dies in those wars, IIRC). For the Nentir Vale end, there are many mentions to the Nentir Vale, and is all info about recent years. It even mentions some NPC from NV sources (like Major Goldspinner from Hammerfast, who has been the major of the dwarven settlement since the last 4 yours, in the NV canon campaign).
So, that means Oerth post-Greyhawk Wars (after Otiluke's death) = Nentir Vale, current years.
Big Mac wrote:Does the book create canon that proves that any other campaign settings are not on the same planet as Nentir Vale?
At least canon statements that Nentir Vale isn't located in Oerth, as Mordenkainen specifically states that the items in the book are from "other worlds. And no, I do not imply other planes, but other places—places filled with various lands and countries with inhabitants that see themselves as the most important and central to the universe, just as we do. I care little for them, as I am from this world, this Oerth.