Final Boss of "The Twinning" Hunting for lore (Spoilers)

[Iscah]

I got the final Alexander battle in raid roulette the other night, and was thinking... Rise is a strange thing, even at the time. This is essentially the point where Alexander says "sorry Quickthinx, im not going with your plan any more" and is testing that we're worthy.

(Interestingly, Alexander only seems to rebel after our time-travel trip to three years ago somewhere around A10 - which is actually the point at which Dayan's soul has just been pulled into the core, from Alexander's perspective...)

Separate lore-ish observation: Alexander uses the same kind of attack as Storge's laser blasts, and acquires angelic wings...

I'm not sure how canon this is, but part of The Rising actually includes a message from Biggs III.

Sentimental bits aside, he mentions 'a certain apparatus' and a storage log. Personally I find it kind of odd to refer to the tower as an apparatus but maybe that's just me...

I've been wondering about that too. I think it's definitely canon - unlike the other vague "anonymous observer" letters, this one is from an established character.

I also thought "apparatus" seems an odd term to refer to the tower by, and suggests something smaller... but still large enough to sneak a bottle aboard, apparently, so if the beacon was sent back separately, where's the rest of it...?

Though having a "storage log" suggests there's someone who's going to use it, which makes it more likely to be a deliberately vague reference to the tower.

Even though you can only see the story messages reflecting your current progress, they do just seem to be phrasing it as un-spoilery as possible - no mention of dying futures or changing timelines. If someone who'd just played ARR and didn't know any spoilers read this, they'd probably think "cool, the Ironworks eventually worked out time travel and sent a thankyou note back to us for being heroes".

(Never mind the G'raha Tia minion, anyway... but they're not going to see that if they just found the text.)

Then again, it makes sense in-universe too. He can't guarantee when we'll read it if it gets to us, and warning our ARR-self to expect a time-travelling Crystal Tower is probably not a great way to keep their plan of secrecy on track.

I also wonder if people that haven't finished ShB would see that letter

They won't - it's restricted by your current story progress.