A couple of quick bug reports:
1. Rain of Fire does not seem to refresh when using a Magic/Faerie Fountain (tested with cheats enabled so I could run multiple tests quickly - not sure if that affected it).
2. (Presumed Bug) Uncovering a NON-tired faerie when there are no empty tiles for the faerie to flee to prevents the faerie from spawning a fountain. (Unsure if it gives its XP reward).
3. The Ritualist's description still claims they start with the "Ritual Kris" even though the Ritual Kris was replaced with the Sacrificial Whip a few builds back.
A couple suggestions
1. Could we get a few extra non-number icons to apply via the flag menu? Maybe different color flags or question marks? It'd be nice to be able to mark some tiles where you're not sure of the contents but want to remind yourself of something (e.g. if I kill a minotaur, but haven't found its chest, it'd be nice to mark the tiles that were adjacent to it so I could focus on them later, and it would be nice to mark a couple of tiles when I know a mine is in one of them so I know to be cautious).
2. You've mentioned that items have different rarities, but as far as I can tell, there's nothing telling a player what rarity an item is (save for finding it in a chest of a specified rarity). This makes it really hard to gauge the usefulness of the dice/topaz amulet, among other things. Could you add something indicating rarity (maybe different color item backgrounds?