In any case, one of my players took True Shapeshifting, and I'm just trying to figure out how to deal with it. Let's say he wants to spy on someone and he turns into a chair . . . is he aware of the person, or is it more like a turtle hiding in its shell? Will getting smacked cause him to take stress? Revert to his default form? Will someone wonder why the chair started bleeding?
In my opinion:
1) the Shapeshifter would be able to make normal Alertness/Investigation rolls in its form
2) getting smacked will deal physical stress but not force a shapechange
2b) if the Shapeshifter is being smacked because someone is trying to deduce if it is a shapeshifter, then I would make it a contested roll, like Might/Weapons/Fists versus the Shapeshifter's Deceit (+4 per the True Shapeshifting Power, modified however else you want)
3) once the Shapeshifter starts taking consequences, I would make it start making rolls to maintain the deception and not show bleeding or whatever else made sense
4) the Shapeshifter probably won't revert to normal until a) it is Taken Out or Concedes, or b) if someone manages to bully or trick it into giving itself away