OK so my players have an insight for Subtle Opening, by observing how a folk witch opens the arts of her apprentice.
What I need is an appropriate Vim effect for them to research. The abilities that the folk witches use are Animal Ken, Cursing, Dowsing, Healing, Second Sight, Shapeshifter, and Wilderness sense.
My first instinct is an InVi spell to see how the opening works in more detail next time they observe it, but does anyone have any more imaginative ideas?
Bob