I'm reminded strongly here about that bit of Altmer commentary about Talos. Numidium is powered by Lorkhan's heart, and would thus be a pan-dimensional "constant" in terms of time and probability. It is beyond reality despite being bound to it. That's why it bothers the old Altmer wizards so much, not just that it subjugated their race but it made a mockery of their own highest ambitions to boot.
So basically, Numidium is a meta-real functionary, if that makes any sense. When you tell it to stomp something, it doesn't just stomp it in that particular moment, it stomps it in all possible moments as well. This makes it a perfect empire builder, since it can ensure that your enemies have no hope of defeating you, even if they get a hold of an Elder Scroll and pull the rug out with some time-hopping shenanigans. I'm not sure what these "chrysalis" might be either, but it would seem to be some means used for combating Numidium in alternate realities. I don't know how this could be done, since it has the raw power of a god behind it.. But seeing as the Hegemony seems to be coming back these days, I wonder if maybe the logicians succeeded, maybe with the help of certain Daedra friends...
It's not powered by Lorkhan's Heart though. It's powered by the Mantella which by association would be an
echo of Lorkhan's heart given that Talos is Lorkhan. It's a chiral reflection of the Heart.
I'm also puzzled as to the meaning of chrysalis shell in this context. MK seems to like the word 'chrysalis', so he uses it quite a bit. A lot of those vagaries look like descriptions of Aetherius and the Dreamsleeve. Also he does the same thing with 'spore', making compound words with it in the same fashion as 'chrysalis'.
The big question in my mind is on the nature of chrysalis shells:
1. Are they naturally occurring?
2. Are they created as time vehicles?
The former would suggest that things naturally move in and out of parallel realities, and if you have the magical stones for it, you can 'hitch a ride' inside of one. The latter is self-explanatory. You metamorphose into a state where you can move freely beyond the bounds of this reality.
To call it a chrysalis
shell however seems redundant since a chrysalis is a shell to begin with, but that's just splitting hairs.
*addendum*
Martin Septim's apotheosis sure seemed like Dracochrysalis to me. I mean he turned into a seething, god-fire dragon.