I don't think that'd work. From what we've seen, what Meguca's actually sense isn't so much grief as it is transmuted grief. I think the most we could do is keep it untransmuted until the moment we need it.
Non, you misunderstand. Witches are reflections of Puella Magi and Puella Magi can do anything. It's highly plausible that a Puella Magi or Witch developed a stealth power that hides one from being sensed. I want to know if we can extend this to our transmuted grief.
Can simply give our grief-flames the property of "You cannot be sensed by puella magi"? Or if it isn't that simple, maybe add an illusion of sorts on top of it that fools that sense, though that's probably going to be very hard.
Some other things I want to try is see if our grief can affect the environment with various forces. Say, make it have a high force of gravity and see if it attracts anything. Check if it can repulse. Then attempt to see if we can make this gravity affect specific objects, like say only water or a specific person and use continuous transmutation of the grief to control it. Then attempt this on other fundamental forces.
Then creating familiars, probably just willing it to life methinks. this is highly useful but also potentially dangerous.
Oooh transmuting the grief into light. How fast can we make it move? Tachyons? Time Travel, here we come!
Also, and I'm really curious about this one, what happens if we change the grief into 4-D objects ala a tesserect? I think it'll lead to a how a standard witch barrier behaves. They always seem to be bigger on the inside.
....Can we enchant grief? What happens if we try to fuse an object with grief? I want to try infusing a normal and a 'magical' object like our hammers with grief and seeing the likely result (if any).
Another idea is to try and teleport or dematerialise and then rematerialise grief elsewhere. If that works, can we simply keep it de-materialized and resummon it when we need to?
Oooh another idea! Our soul gem basically creates grief whenever we use mana. Is there a way to study this phenomenon in our soul gem and try to recreate it? Or reverse it and convert grief into mana.
Finally (I swear), we should potentially be able to create witches. Familiars are formed from pure grief, and by absorbing grief they can grow into witches. This means.... well we can create souls. Which would likely be Sabrinas as well. Hmmm.
Also in the idea of changing it into potentially dangerous stuff, we already know that we can control various properties of grief without transmuting it including the corrosion (IE the old mist) and acoustics. We should look into the degree we can affect it without change. If we want to we can just transmute it into something that corrodes everything we want it to. It's properties are ours to decide. no need to limit ourselves to conventional logic. If we want the grief to be able to do something it'll do it.
Also, if we can bend space with grief can we hide it inside a pocket of space? If we can affect space with barriers, why can't we affect time? The two are very closely related after all and Homura can do it.
I-I should slow down for a bit I think. I can already think of dozens of use for time-manip. Oooh, a way to manipulate space, saturate something with it and give it the property of being "bigger on the inside" or rather stretch it in a sense without actually moving it. This might work with a solid ball of grief and then making space inside...or...
Oh no... I can't stop! must! Nooooooooooooooo! I- Sci- No- SCIENCE!