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GingerDiceHoarder |
That's completely your call, of course.
Yes, I was using the word "mundane" to mean "non-magical", and thus equivalent (in this case) to "Extraordinary".
To my knowledge there are no instances of Supernatural blindsense/blindsight. I believe that's exactly the point of senses like lifesense and spiritsense. A creature with lifesense doesn't have a special sensory organ for it, it simply knows where every living creature sufficiently close to it is. Blindsense and blindsight are common, everyday senses other than vision that are naturally (or have been trained to be) so extraordinarily sensitive that they allow a creature to sense its three-dimensional environment with an accuracy near to or equaling that of human vision in a sufficiently lit environment.
If I did run across a supernatural blindsense/blindsight (and managed to notice that it was Su instead of Ex), I probably wouldn't allow Dampen Presence to work against that either. Basically, I'd rule that standing really, really still (even slowing your heartbeat) doesn't do squat to hide you from magical/supernatural/occult/whatever senses that don't utilize your movement or its environmental effects (such as sound, air movement, and vibrations) in any way to detect you.
That's just me, though.
(By the way, thanks to the flavor text provided with the feat, I'd probably rule that it does work against tremorsense, probably with a decent penalty, even though the feat specifically says it doesn't, just because it makes sense to me.)