Spell effect idea - create a "false mind" that would deceive an InMe effect, and/or possibly become the sacrificial target of Mentem attacks (ala Wizard's Sidestep). This would be something comparable to the CrVi effect "Shell of False Determinations" (p 157) - with or without the relative spell level requirements (pro'ly without).
This "false mind" could then (hopefully) become the "Target" of any attack or probe - (tho' I'm not sure how a mind is "sensed" by the Hermetic Caster in the first place, and so where/when this "false mind" would become the target as opposed to one's actual mind).
It could, if accurate enough, also be something to be referred to "later" by magi, by copying the mind of a target. (This might be expecting too much, and some detailed information - especially magically useful details - might be beyond the scope of such).
The problem is... there are no guidelines for "Creating a Mind". CrCo 5 creates "a corpse", but there is no guideline to create a living, soul-less body either. The closest we have is the MuMe Base 25 to "make a mind solid", and that CrAn 10 creates an animal corpse and 15 creates a live mammal (& mammal "mind") - so +1-2 magnitude bump for that?
So, I'm thinking the Guideline might be something like...
CrMe 15: Create a "mind" with basic thoughts, emotions, memories and responses, but incapable of new, independent, creative thoughts*. This is a "generic mind", but appears real enough until probed at InMe Base 15 or better.
CrMe 20: As above, but patterned off a known model - the better known the model, the better the copy, but no such copy is ever "perfect", even of one's own mind. InMe effects do not automatically detect such minds as artificial unless designed to do so, or an effect (often with duration) reveals some indication of such.
Rego and Muto spells can make an "unthinking" mind appear to be active and responsive, and may further deceive InMe probes.(* For what should be obvious reasons of both Hermetic Limits (Divine Limit) and game balance, a true, thinking mind should be well beyond Hermetic Ability. Such a mind may "think" of hunger or consider a murder as "bad", but will never wax philosophical or invent anything new, and even "conversation" would become dull after a few exchanges.)
This would mean that a spell might look something like this...
The Honeypot Mind
Creates a duplicate but passive mind of the caster. Further spells would be required to make it appear "active and responsive" to detailed InMe probes.
(Base 20, T:Touch +1, Dur:Sun +2, T:Ind)Admittedly this has not been thought through completely, and I fully expect some hiccups that I simply haven't yet foreseen*. But I do like it on first pass...
[i](* If put into a body, "nothing" happens - no creative thought = no will, so no independent action. A ReMe spell could create the appearance of such, but a ReCo could as well.
As far as "copying a magi's mind" for magical information, the casting mage would first have to have a successful deep probe of that other mage's mind to begin with, and once that is done the copy strikes me as largely unnecessary. Some interesting "doppleganger mind" effects could be produced, tho'...)[/i]