
You're looking for Encyclopedia Eorzea, page 244. I'm sure someone has a scan of that somewhere. 
EDIT: Interesting easily missed tidbit on that page: the Deck of Sixty has appeared in every Astral Era. It's what L'yhta would term "deep magic" -- something that has grand significance magickally and represents a principle woven into the fabric of reality.

EDIT: Interesting easily missed tidbit on that page: the Deck of Sixty has appeared in every Astral Era. It's what L'yhta would term "deep magic" -- something that has grand significance magickally and represents a principle woven into the fabric of reality.
The Freelance Wizard
Quality RP at low, low prices!
((about me | about L'yhta Mahre | L'yhta's desk | about Mysterium, the Ivory Tower: a heavy RP society of mages))
Quality RP at low, low prices!
((about me | about L'yhta Mahre | L'yhta's desk | about Mysterium, the Ivory Tower: a heavy RP society of mages))