Myth of the Deck of Altered Fates

The myth of The Deck of Altered Fates, is a myth relating to a series of decks that were made many years ago by thePriesthood of Aithris , back when she was considered part of the High Seven.
Back during this time, priests of Aithris created many of what became known as the Deck of Altered Fates. These were used, just like the name suggests, to alter the fates of people who drew cards from the deck.
Over time the popularity of Aithris declined and her spot in the high seven was replaced by Brigedda. As a result the priesthood could no longer afford to make the decks and those decks that survived were slowly used up as people drew cards. As soon as a card is drawn, the card vanishes, so there is only a finite, and dwindling amount of the decks remaining in Erilar.
It is theorised by scholars that Aithris' decline in popularity is due, at least in part to the decks as they could brin either a boon or a curse to those who drew from her decks, meaning that there was a risk of someone's fates changing for the worse.
Decks can still occasionally be found in old temples dedicated to Aithris, and some high ranking members of the Priesthood of Aithris and even the The Holy See are said to own a deck, although these are treated as holy relics.