About the magic from inside, I believe the first time you have that is actually the initial time you fight against the Demon girls. I think that you are able to channel magic from inside yourself in that fight, and a handful of other times throughout the game. Quite often I remember blue lights for the enhanced cumming being referred to as channelled from inside you, as well as a few other specific situations here and there. And as for lights targetting/feeling a pull towards a certain person, that happens quite often. It especially is brought up with contracts, transformations, mental changes, and even dreamsculpting. Really the only lights that tend to not seem to be drawn to someone before you even cast them are lust, heat, and any of the minor lights for the most part.
What I will note with accelerated pregnancies is - as opposed to, say, bimboifications - I couldn't seem to find a way using console commands to alter this back, if you end up regretting the decision after the fact. It vastly changes the sex scenes with said characters, including any group scenes, and if you find that you aren't a fan of the new models (even if you do enjoy pregnant content, the actual models aren't necessarily the same models as the OG characters, which you may not be a fan of), you will have to go back to the point where you made the decision to accelerate the pregnancy to change it, as there is no way to revert it.
I found in the playthrough where I accelerated all the pregnancies that I really didn't enjoy that choice, but not until quite a while into the game, as you don't immediately start having sex scenes with the accelerated pregnant girls to see the new models. And I found that the amount of variation in the scenes with the accelerated pregnancies was far less varied than before. With bimboified characters, you can simply open up the dev console (f12 on firefox) and change the variable, and change between the two forms at will if you prefer one over the other. But with accelerated pregnancies, I was unable to find the specific variable to change that, so the only option is going back to make the choice.
Personally, I'd say if you're not both particularly into pregnancy sex above all AND not all too attached to the particular models of the love interests that you are accelerating, I would suggest skipping accelerating pregnancies, at least on a first playthrough. Eventually, it's worth checking out if you want to see that content and decide to do multiple playthroughs of the game, but it's hard to recommend doing on a first run for those reasons.
If only the actresses of those love interests had a bunch of pregnancy content to work with, but obviously they don't. And I really wouldn't expect - or honestly want - to see g28 trying to do deepfakes to make accelerated pregnancy sex scenes work with all the possible characters. That would just be so much extra work for such a small amount of content that would only be seen by - likely - a small portion of the userbase, and still wouldn't be a great compromise, because the bodies obviously still wouldn't be the same girls, they'd just have deepfaked faces.
