During the game, when pulling up my character information, I noticed that my base Willpower has dropped from its previous score of 26 to 23. I definitely didn't see any stat loss messages, and I didn't get a lot of new corruptions (the +1 St/Dx/To/Ma -1 Wi and individual corruption effects show up under modifiers anyway). This also happened in another game I have played and finished, and both characters shared the Babbling Mouth corruption. I never got a chance to see exactly when the Wi was lost - I was too busy focusing on other things, like fighting monsters and such. Could the loss of Willpower be from the 'free' spells, merely having the corruption, or from some factor of which I'm not aware? No other base stats were drained, just Willpower.