Hello,
One thing that I thought would be fun and might be neat is if people could affect items, particularly foods and drinks. What I mean by this is if clerics cast bless on water, it has a chance of creating holy water. Consquently, they could cast bane to curse the water and make it tainted.
Releted to this one might also be able to try and poison food and drinks, though I think one should need some sort of high skill, not sure which one, to see if the drink was poison. That way not everyone knows that it is poison just by looking at it, but some who are skilled at it might be able to figure it out.
I am curious what do others think of this idea.
-herkles