Milk

The recent spoiler stream confirmed that Moonlight is Shai, I think. Besides, Moonlight literally calls herself Shai as an Elantrian. Presumably, she is unpracticed with the Essence Mark because she can't power it.

Mraize actually mentions this in Chapter 13 of RoW, saying that Radiants and spren (among others) "cannot travel farther than Ashyn or Braize." Not sure about the ten gas giants in the Rosharan System.

Not really? We see two full Skybreakers with twenty squires while Szeth is training, so seven squires isn't all that much.

That would be the case if they were all Rosharan. I think it's more likely that only one of them is a full Radiant—who doesn't even need to be a Rosharan—and the rest are squires. I doubt that the Ghostbloods got that many highspren to join.

Skybreakers can choose to follow the codes of a criminal organization. Besides, Nale's group of Skybreakers is also an underground organization.

Bravery is much closer to Valor than Odium or Cultivation, though.

Arguably, pre-Shattering Investiture could still have Intent. Spren created by Adonalsium were largely of Cultivation, for example, although Cultivation wasn't separate from Ado until the Shattering. Besides, the Investiture of/from the Dawnshard would match its Intent (in Rysn's case, Change), no?

Forgery changes one's Spiritual self; a Spiritual change will have some level of descending consequences to the Cognitive and Physical, I think.

We don't know whether the Evil occured at the same time as Ambition's death, actually; it might have been unrelated. I think that her Splintering affected the Shades more than the Homeland. I don't think that we know when Nazh left Threnody, so he may be behind on its traditions or its state.

I doubt it; spren, highstorms, and other manifestations of Investiture existed pre-Shattering.

This same WoB actually suggests that Seons are not bound by the same restrictions as spren. Perhaps it's due to the Shards not actively Investing in the planet? Shades can leave Threnody, according to Secret History.

I don't think this is particularly relevant. Breaths are of Endowment; they can leave Nalthis freely, so I don't think Vasher would face any big trouble. Furthermore, Seons are able to leave Sel, and they are pretty similar to CSs.

Ashravan can't go Worldhopping, since his Soulstamp would fail outside Sel, but Hemalurgy would work. From what I can tell, there are two possible states that Ashravan could be in. 1) His soul has left the body, and the Forgery is essentially a more impressive Lifeless. 2) His soul is still Connected to the body, but the Resealers couldn't heal the brain to the Cognitive/Spiritual aspect because Selish healing is bad. I have no idea what'd happen with better healing. Returned are Cognitive Shadows, and Ashravan is not one. You could see CSs as artificial souls, though, if you believe that they are bits of Investiture fit into the mold of a deceased person.

DS, ch. 19: “There are songs . . .” Cord said. “From long ago. Of when this . . . Command came through the pool.” It entered Roshar through Cultivation's Perpendicularity, apparently. I don't think that's particularly relevant here; the perpendicularity is located within Patji, an avatar of Autonomy. Perhaps a more mysterious one is Yolen's?

Yes, the initials of the books form a ketek. (It's specifically divisible into five parts) Brandon has a tentative title for Book 5; Knights of Woeful Truth, which would be shortened to KoWT.

Although I have made a mistake regarding Axindweth before, I'm fairly certain that we do know of a feruchemist in the party. The RoW prologue makes note of the palace steward named Gereh, who was a feruchemist according to the Coppermind. (He was killed by Mraize; Lift takes his Aviar) His (lack of) rings are also noted by Wyndle.

In Vorinism, H can replace any letter. See Nohadon, whose name is considered symmetrical.

Perhaps it's metaphorical? It would line up with Mr. T's whole "win no matter what the opponent does" idea. Either that, or thunderclast.

Ah, but you see, this theory suffers from a single, terrible logical error! Urithiru is above the clouds.

Perhaps the original suppressor didn't simply block Surges, but instead their applications as used by the Fused? Thus Adhesion, Reverse Lashing, and Regrowth wasn't blocked, and when Raboniel corrupted the Sibling, they could still function. I would imagine non-Voidlight Surgebinding was blocked.

Venli does use Transportation, though? She uses it to see if voidspren are watching, and spots Tumi.

That's what Kal and Syl suspect. I don't think Lift used Growth during the invasion, though. Oh dang, that's my bad! I just instantly suspected her as one when she introduced herself, and didn't bother to check.

WoB is that they're not, but he notes they are connected in some way.

Navani and the Sibling are probably creating towerlight by pulling from the SR. The Stone of Ten Dawns is said to have been shattered, so that's something to note. In my mind, Lift could use Progression because she's using Regrowth, rather than Growth. The Magnified Ones have only shown the latter, so it's feasible that, like Reverse Lashings, the Sibling's defence didn't account for the ability. (I assumed Axindweth was a Sleepless, apparently not!) Renarin uses Fortune to see the future, which is tied to the Spiritual Realm. His power, in that instance, also showed the "perfect state" of Moash, further connecting it to the SR.

Oh, I see. That makes more sense!