Hello,
Been using Minty Spire for a while and it has been working great.
Found a minor bug at the shop, when I hover over Letter Opener, the card remove should flash red, but it does not. https://imgur.com/a/fWl6ie7
When I hover over peace pipe, it does flash red as it should. So it seems like the issue has something to do with these particular cost values.
I think this mod was made by MMagicala