I strongly oppose revealing this capability at this time. Being able to pull a bomb or jet fighter or squad of predators out of storage, or put one into it, is one of those capabilities that, if metered out carefully, might buy us four or five Chosen kills.
I have to admit, we probably do tend to grossly underestimate just how blatantly overpowered Jade's "malletspace' ability can be.
Other thoughts that are important: That bit about the Chosen spending a couple weeks training after every death? That's the universe telling us that we'll never be able to kill a Chosen in the same way twice. We have six Chosen that each need to die eight or ten times. We need sixty different ways to kill a Chosen. This is 100% going to be entirely down to everyone being very, very careful, over a large number of votes, to let out a very small, steady drip of new capabilities exactly when they would be most effective. Every time we throw something out for shits and giggles it means we have to find a few more ways to kill a Chosen. So please weigh that against every "pull a cold drink out of storage" vote - is it worth the pain and shitstorms and stress of having to fight a Chosen when we've already killed it eight times and it's on its last life and wise to all of our tricks? Because that's the trade-off. You can either have a cheap one-line laugh now, or you can finish off a Chosen by pulling a laser rifle out of storage and blowing its completely unsuspecting head off.
That said, as Subrosian points out, it seems far more likely that we're going to kill the Chosen by some means
other than attrition. I don't think "no, we need to keep our abilities hidden so we can find sixty different ways to kill a Chosen through ability exploits" is viable, if only because this quest would become
hopelessly boring if we had sixty successive votes on how to come up with new innovative ways to kill Chosen. At some point we're probably going to have to figure out how to track them to their Obelisks. Or otherwise render them irrelevant.
[X] Call Doctor Vahlen out for not saying hello. You wanted to contact XCOM specifically and she doesn't even admit when you succeed? Rude.
-[X] Also, shouldn't you at least be having this chat in a more secure venue? Dumping loads of intel is good for getting their attention and trust, but now that you actually have the first of those two, you really should be going.
--[X] Ideally one where you can actually make sure you are talking with XCOM instead of someone pretending to be them
[X] That depends on what you receive in return. Anything you trade them will likely end up in the hands of the Ethereals given time, so there are limits, but at the same time you've access to multiple planes with divergent development.
-[X] Query Agneyastra for suggestions on initial offers while you talk.
-[X] You understand how dire their situation is, and are willing to help, of course, but you also have other commitments that would benefit greatly from their help
-[X] Provide entertainment media for free