I've only delved down into level 3 so far, but both the first and second floors had just one healing crystal each. I'm wondering if I can always rely on finding one on each level.
So, are there any levels without crystals, or are there larger levels that have more than one?
If there are any deviant levels that ruin your perfectly good yes/no answer, please hide the list behind spoiler tags to maintain the surprise for those who don't want to know exactly what to expect.