I'm going to try to play "interpreter" here.
I *think* Nedako's idea is "Create a doohickey that will transport a mortal to my celestial abode. Do that *in* my celestial abode, so it's free to create. Take it down to my tribe--physically carry it via Incarnating with it. This will cost 1 Belief point. Use it to transport one or more mortals to my celestial abode, and Miracle the mortal(s) there--power 'em up as much as I want, laying on the Miracles just as heavy as I feel like, at no cost. Then send 'em back." (n.b.--I presume this might require another teleportation doohickey; this shouldn't be a problem as it's effectively a duplicate of the first one...and can be constructed for free in the celestial abode.)
And *as long as he doesn't care if it all expires at the end of a year*, the whole process only costs the 1 Belief point required for Incarnating once. If he doesn't bother paying maintenance on anything, then the teleportation doohickey will stop working at the end of a year and the supercharged mortals will revert to normal a year after their enhancement. This might meet all his required needs--it'd give him enough time to, say, supercharge ALL of his followers into Continent-Scale d12+6 combat/magic/etc. behemoths with the ability to fly between landmasses at supersonic speeds (and whatever else he happened to think of) as part of a master plan to stomp all of the Elder Races to extinction (with the rest of humanity and other minor races obliterated as an afterthought, if they didn't all die off as mere collateral damage). After which, he'd have no NEED to keep 'em supercharged *or* keep the teleportation doohickey around, and just wouldn't bother paying maintenance on them. So the mortals revert to normal, and the teleporters vanish. He doesn't care at this point.
There. Idea (or at least my interpretation of same) explicated without use of the apparently-problematic jargon terms Hero and Artifact.
Now, *my* take on this is to apply the basic "sanity check": "Assume the Elder Gods are not utter drooling idiots. Why didn't THEY do this thousands of years ago, if it's so simple?"
And the usual answer would seem to be, "Either they did, and they discovered it wasn't that simple--or they didn't...because they already knew it wasn't that simple." (Sure, they might have been wrong in *assuming* it's not that simple, but that's going to be *rare*. Traffic here would seem to suggest that it's an everyday occurence...which implies that the Elder Gods are, in fact, blithering idiots. Which they're not, or they wouldn't *BE* Elder Gods...rather, they'd be extinct.)
I'd suggest that there's a "meta-rule" regarding casting Miracles in one's celestial abode: it costs nothing to cast there, *as long as it has no effects on anyplace else*. if it affects the material world (or someplace in the celestial realm in which the deity must spend Belief to cast Miracles), then it's going to cost *something*. Thus taking the teleporter doohickey down to the material world would cost Belief (maintenance, perhaps?), ditto the supercharged mortals.
Or alternately, perhaps taking mortals to one's celestial realm is a matter that Fate takes a personal interest in, and thus deities can't do it without getting Fate's direct previous permission...which is not given lightly.
Hmm...what exactly is entailed in manifesting physically? I get the idea that the material body is *created* in the material world, and the Deity's spiritual essence (or whatever) "gets into it" like we'd climb into a pair of trousers. This could make for some difficulty carrying items back and forth that aren't part of the god's commonly-visualized form.
In short, I guess my position is that "if it's not already on the Short List of 'free or nearly-free ways gods can interact with the material world' (i.e., hear prayers, use Divine Sight to look in on followers, manifest physically, etc.), then there's some reason a god can't do it for free remotely by casting miracles in his abode." (If you could create a Scrying Mirror in your godly bedroom and use it to look anywhere in the Known World for no expenditure of Belief, there wouldn't be special mention of Divine Sight *in the vicinity of followers* in the list of godly attributes, yes? Instead, there'd be a generalized "gods can see anywhere in the Known World while in the celestial realm" ability.)
But maybe I'm just thinking too small....
(This got *way* too long. Sorry 'bout that. I get verbose sometimes.... *blush*)