Is this wiki meant as a public dumping grounds for everyone's Nobilis-related ideas, or just the creator's and his friends and/or players? I would love to share some of the campaigns I have run and experienced thus far, if that is what the wiki is for.

I should ask and find out what the preferred permissions are to minimize the risk of vandalism. Until then, just categorize any new pages you create so that I don't have to go back and recategorize them later… I have enough of those to do already. :(

If nothing else, that would either cost MP or be more than a single CP, for such a Gift.

EDIT
Also, changed the Gift so that it now only tells him that others are coming near him, not their position relative to himself.
And I've increased the Miracle Level to 4 now, as well.

Just like how normal people being stealthy are still visible; they're just taking trouble to make sure you don't see them. It's the same principle. If stealth didn't work this way it would be impossible to do a lot of things that stealth-based characters are going to want to do.

Even if you act with stealth, you will still leave a blank spot, won't it?
That is, after all, a major part of miraculous beings - they leave blank spots on Divinations.

Otherwise, it'd be easy to find, say, Cneph or find out who gave the Excrucians their first Estate, since they wouldn't leave blanks on Divinations.

In fact, even if they use a miracle, to hide themselves in order to sneak up on him, that also leaves a "blank spot" for him to notice, doesn't it?

And, since nothing short of Imperial Miracles (and Blind Lie, I guess) can alter Masks perceptions or thoughts, he should notice when an area suddenly appears as something he can't know anything about at the moment.

I just thought Existence was troublesome in that it probably counts as a "wide variety of Estates."

EDIT
I mean, the Nature Spirits won't be able to hide from him, so when he notices that he can't tell where they are, he should at least become cautious.

Though I'm not too sure what was wrong with it when he had the L. Div. of Existence instead…

The main issue with the Gift is that it's built on a level 2 miracle, so Aspect 3 stealth will still technically beat it.

I think the effect you want might be better served by taking Immortal and giving yourself a "Vulnerable to binding" Limit.

Say you have a fight against an Excrucian (a shard hopefully), who traps you.

Now, with full Immortality, you will get out within moments, really.
With this, your side has to waste time and energy to free you, which would allow your enemies to better attack your group.

Though I suppose I could give the Duchess Sacrosanct instead, and use the CP to give her Invisibility or something, if it would be important.