Okay, it seems like people with the ways of generating more mana have all been pretty successful at getting a lot out of the methods:
- gurev and ixa have set up a "blood to mana" / "heal" combo to get lots of mana. Gurev is also going to teach the spell to Isha, plus Jade and Natasha, who will be helping the wizards. So hopefully the wizards aren't *totally* screwed when gurev turns into a zombie.
- achester and jasonye both have been biting zombie Jackie to get value out of "mana fangs" without the health loss
- jasonye and soon maybe boof have been using "knowledge is power" on the secrets that they have learned from "teach spell"
Also, I had initially forgotten to put a "times per day" limit on "knowledge is power."

But I fixed it now. 4 is still a higher limit than either of the other mana-generating spells though, because it has the "unique rumor/secret" limit, and because I designed it expecting fewer secrets to be put in, vs rumors put in.