I don't really know if this is a do-able thing, but I'm kind of obsessed with lore and collection, along with puzzles, is there any way we could have something like really vague hints on how to unlock the grimoire cards that say "Card not available"? This is kinda a low priority request, but I have a feeling that if we all had an idea of how to collect some of them, people would be interested in getting more cards. :D