Originally Posted by
Tome
Let's see, there's a few options for Prayers, though they're mostly opportunity cards. The only ones that are both repeatable and give more prayers than you could by grinding and converting Shrieks are:
You can trade scraps for them. 15 scraps gets you either 20 or 80 prayers.
The Correspondence Savages Your Dreams and Song of the Mandrake cards both earn you a few prayers, enough to be worth playing.
A loop through Polythreme can earn you 130 Prayers if you can get both Fascinating and Investigating up to 7 and choose What's Going On Here? at the end. Should you fail to do so, A Distressing Lack of Progress will still net you 65.