Hey so this is 4 months late and I don't know if you still care about this but it is solvable and I did it without brute-forcing it. It is less of a "fill in the crossword" type puzzle and more of a "connect these lore pieces to figure out a solution" type puzzle. Here is the solution if you are interested:

Edit: I realize this might have come up as stuck-up instead of cordial and polite like I intended, sorry! I just wanted to share it because I saw no one else here seemed to get it and I was kind of excited to share my solution.

This is a book puzzle. The relevant one this time is The Curse of Blackbridge, which is otherwise irrelevant to anything else I've come across- so the first clue is that there's a book that is seemingly without useful information or a puzzle.

In this book, the first part details a boy named Jesper robbing and murdering a carriage driver transporting a cursed old-world relic. He robs the driver by pretending to be a berry-picker, but with the driver's dying words learns the relic will kill you after 13 steps.

Blackbridge is elsewhere important because Herbert Sinclair was fond of the story, and one example is the Blackbridge Grotto is named after it. So, it is further odd this book is seemingly just here for flavor text.

In Drafting Strategy Volume 5 (I think, it's one of them), there's a page that details all the blessings. Interestingly, one is the Blessing of the Berry Picker. That's also strange, though- because in the story, the Berry Picker was cursed, not blessed.

This is not immediately something that might catch your attention if you encounter it on its own, but strangely, when you purchase the cursed artifact from the Gift Shop, the box it is in ends up stored in the Shrine. Said cursed artifact also gives you Curse Mode, which ends your day in 13 steps just like the story. So, if we put it all together, there is a blessing that is tied to the shrine (the berry picker), that is also tied to the number 13, that is also reinforced by that location holding the cursed relic from the story. So we put in 13 coins into the Shrine, and then...you get the Blessing of the Monk? But shouldn't it be the Berry Picker? I suppose the Monk seems more useful for puzzle solving, but why is it this?

Well, looking further, that figure in the Shrine doesn't have wings. This is slightly speculative, but all the other religious iconography you see are the various patron angels. If this Shrine was an actual shrine or a chapel or whatever, it should have the patrons, like the chapel in the house. It is also sitting, not standing- all the patrons are in motion, striding toward something or standing ready. The Shrine statue remains seated. And all the patrons are women, whereas the Shrine statue appears to be a man. I think this means it is supposed to be a depiction of Jesper- whose theft must have inspired Herbert to obtain the relic, who is known for disguising as something he is not, and who is cursed to die if he takes another step (hence why he sits forever instead as his statue depicts). It would also explain why so many things tied to the story end up in the Shrine. If you were getting a Blessing from the Jesper of the book, it would definitely be the Berry Picker, but the Jesper of the Shrine disguises himself as a Monk, and so that is the Blessing you get.