Quote Originally Posted by gbaji View Post
I don't think whether it's sentient or not is relevant to the question: "Can Roy PWOK! his sword back to himself?" (and yes, admittedly, the answer involving a kobold riding on the dragon outside of the AMF was equally non-relevant as well).

Magic can take effect outside an AMF normally. So, if we assume that Roy could normally PWOK! his sword to himself even if it was currently being held by someone else (IMO, a reasonable assumption), then he can do that as long as both the sword and himself are outside the AMF. Where the dragon is, and what percentage of the dragon is inside or outside the area of the AMF is completely irrelevant to that consideration.
It is indeed relevant. If a character is in whole or in part inside an AMF, all magical effects are turned off for that character. Assume a character bound by chains to a wall who is partially within an AMF, who wears a ring of Escape Artist Skill Bonus on a hand outside that AMF. Does he gain the bonus to escape or not?

As in the specific example I cited, if Calder has magic which improves his attack or damage rolls, even though his tail tip is not in the AMF, a tail attack would not gain the bonuses that magic offers.

On the other hand, an AoE spell might affect the parts of the body outside the AMF, and magical protections against that attack would not apply, (though Cover Rules might be an issue.)