It seems odd to me that a Detecf Life kind of spell would work on ghosts, skeletons, even vampires. I think it would even make the game more fun to have some enemies not detectable. What do you think?

Because Aura Whisper is a rare shout that is actually better than the spells of similar effect.

Its not a spell, its a shout.

I just wonder why it doesn't work on Quaranir.