During the beta and on the skill calculators out there, the Codex of Power had a lot of aspects listed in it that did not have a source location for where they are learned. My brain assumed that meant the ones without a source listed are aspects that we can’t learn from dungeons and can only get as RNG drops.
But thinking about that more, the Codex is supposed to be the system for learning aspects and imprinting them, not just a list of every aspect in the game?
So my question is does anyone know if all the aspects that were in the Codex will be learned from dungeons at launch and just didn’t have a source listed yet in the beta? Or will those without a source only be available via drops?
I thought they all had a source listed in game but I didnt look at all of them so maybe not. There are over a hundred dungeons. Maybe the ones without a source were just from places we don’t have access too yet. Some of them might come from finishing acts or certain parts of the story or something too. I’m not sure.
I heard someone in our clan saying, that some were drops out of the random? ( which still feels strange, but plausible at the same time )
I know there was plenty who were locked behind Act quests, and were just not collectable 
i’m confirm you can get some codex of power were locked in list because you can’t reach it in beta
for example:
Crashstone Aspect: Earth Skills deal 40%[x] more Critical Strike Damage to Crowd Controlled enemies.
It located in Scosglen, it will show you the way to get it by pin it on your mini map but it was locked. I found 3 of it via drop/gambling gloves, extract it didn’t add to codex of power list
ofc there will be some legend aspect only via drop
I’m pretty sure everything in the Codex of Power is “learned” through completing the dungeons around the map. The devs stated on twitter that the full amount of legendary aspects in the game is over 2x than what is listed in the Codex. So over half of the legendary aspects are found through normal drops and won’t be listed on the Codex.
There will be crafted codex of 2 types, in the live game as well
But some are unlocked by completing some quests too 
Not what I’m asking. I know some of them had locations listed in zones we couldn’t get to during the beta. I’m asking about the ones that did not have a source listed at all.
Also not what I’m asking about. I’m asking about the ones that are listed in the codex, but without a source.
The skill calculator has all 224 datamined powers plus uniques. The ones without sources are not in the codex. Only 120 of them are available in the codex. There will likely be more legendary powers that we haven’t seen on full release as they said less than half the powers are available in the codex.
maybe that has something to do with the dungeons they drop bein locked behind other content. Like Strongholds. So after freeing them, you now have a source of the aspect, since youll be able to enter now.
Maybe I’m just mistaken then. I could have sworn there were aspects that I got as a drop that I then wanted to see if I could learn them in codex, like for example the Druid aspect that causes Tornado to seek targets, and it was listed in the codex but without a source.
Maybe I was just looking at the calculator a lot also and am remembering wrong.
One uses datamined info and the other is an outdated build. You can never really tell until release.