Yata

Breath are slowly consumed in Awakening. The Color seems to be an extra you Need to performe the Breath trasfert (like the Heat when you trasfert Stormlight). What you have to understand is that: Breath, Stormlight, Mists, Dor and other things are Simply amount of Investiture. More precise, they are Kinetic Investiture....every One of them could fuel every magic system with the right "trick". They could have different proprierties for the Shard's Investiture they are made from...but they are mainly the same thing. You could in theory, fueling Surgebinding with Breath or also with the Mists or with the Preservation's stream you gain from burning a metal. It Will be hard like Hell...but you could do It. All this kinetic Investitures act as fuel for magic, you could not generate Energy/Power from nothing...the magic (at least the end positive ones) needs a source of power to act. The Focus instead It's something that "shape" the effect the magic has. You could think to It as an interface. It's the "man in the middle" between the fuel and the effect. The Nalthis' focus is Command and the Breath thanks to the Command is imprinted with the right Cognitive Aspect to Place upon the target. Similary the metal is the Filtrer for the Preservation's Power to be traslated into an effect. Or the Form is the way a simple kinetic Investiture like the Dor turns into an effect. I suggest to avoid to put the lerasium in the discussion as It adds only confusion without explain nothing...as the Lerasium is not a core part of the Metallic Arts at all.

Yeah this is possible

Like Argent said. It could be among the Ones Above but no direct apparence. Indeed someone (me included) think He makes has an indirect reference in Shadows for Silence. As the being who inspired the White Fox's legend

The third Oath is already about the protection of people regardless of your attitudine to them....so I see It as unlikely.

I think they not as to properly Bond with Nightblood, Szeth will die in the process. So unless Nale manage to find a way to make Szeth to survive this Step....the two aren't bonded yet (also if the scene between the two seems to suggest the opposite. So maybe Nale really performed some oddity to allow It)

The link is very vague as there are both Rosharans without accent and worldhopper with the right accent after spending time to learn the language.

It could, this Hypotetical surgebinder Will have 6 Surges avaliable (assuming the Blades and bond don't overlap some Surge). I am afraid to see how badly efficienty would be.

I think he refer to the Inquisitor Kelsier killed. In this night, He died too and reached the Well, after a while the Inquisitors arrive with their brother's corpse. They remove the Spikes and place them into a blodd filled jar and then they dropped the body into the Well

Yeah if Szeth becomed a Cognitive Shadow, his ties to the physical would be severed and this mean he could not be Healed by Nale

Because Kal see himself as a Slave. The Brands are part of his cognitive self and not an anomalous state. Lopen never accepted the arm lost. If he did It...It would be unable to heal his arm

Feruchemy's protection reaches only a certain degree. If I don't remember wrong. Sazed states he managed to stand still and not be crushed by his own Weight because he was tapping Strenght too (I think It's a scene in the siege) Extreme Zinc Will have other kind of problems (except make you die for starvation in some seconds)

A Shardblade's bond (and a Nahel one) is broken when the owner dies.

I don't see the link between the two facts. Anyway we know Szeth is not a Radiant at all as we know he can't currently use Stormlight and use fully Nightblood without dies. Szeth's attitude surelly will attract a Skybreaker's Spren...But he is bonded with Nightblood, this could keep other Spren far from him

As Calderis said Feruchemy helps you a bit to sustain Its effects. In Speed's case, Feruchemy protects you from acceleration alone. So you have still to worry of Wind resistance, friction and probably any kind of impact.

How is this possible ? Taln just arrived from Desolation, He is not really in good mind shape. Much more, he had not time to find a Shardblade, much more to bond with it.

I will remain vague because it's not the right subfurum but we know mundane (and also magic) Soul's cracks (beyond a certain treeshold) isn't enough for a Shard-level being to control someone.

Mind control and possession are incredibile hard for Realmatic Reasons. You need to broke the subject's soul more than the mundane life could do.

Szeth was Simply healed with the Progression Surge. We saw already similar feats on Roshar EDIT: Of course the Surge was provided by a Fabrial

Indeed I think this could work, to be honest I think this work all the time and the placebo is just an help. The difference between a fit person and the same fat persone in the guy's aspects it's cognitive. So a little by little a person who saw himself better than how he is and have access to a form of healing (Surgebinding in this case) would become a bit more fit over the time for his own "healing". PS: I think this is the reason for Jasnah's beauty over her age and habit...She see herself as the perfect Alethi's woman, the pinnacle of the Alethi's society...The Stormlight help her to maintain this standard (Honestly I am really doubtful she even know it)

This is really unlikely as Hoid explicity said that he "spent an year inside of a greatshell" and this is really aganist the idea he throwed himself in the beast to worldhop....It's possible he used the Greatshell to hide himself, or maybe as a way (or a backlash) to manipulate Fortune

Surgebinding is a Magic System that allow to access to the surges under H&C's filter (There is a WoB about). As it is clear the Surgebinging arose from both Honor & Cultivation. But there are different way to gain Surgebinding's abilities. This "way" could be indeed made by Honor, Cultivation or both. The Nahel Bond is a "way" using both H&C as bridge as the Spren are a mix of them. Honorblades seem to be a "way" made by Honor alone and (very probably) Fabrial are a way mainly of Cultivation.

Probably the area will be the same, maybe it will simply boost the AonDor in the sorround (as Elantris did) beyond its right powerlevel. Yeah the problem of "Elantris or Elantrian" as starting point is really weird. But notice the Elantrian could use their power also without the Elantris's Aon at work. We saw this in the book, simply they Aon will have their rightful power without the artificial boost Elantris provides. Raoden's Aondor before the Elantris's fix and Aondor in Teod are example of this. It's unsure but probably an Elantrian far from Arelon when the Chasm appeared will avoid the Reod.

Surelly Rashek knowed all the Allomantic effects...but if he know the actual metals and much more the ratio for the alloy isn't sure. You may see from the message he left in the stores. That He putted people to study and research the "new metals"...So maybe he didn't know the details or simply his complete knowledge fade away from him after the Ascension's end On another note, the Atium as we saw them in the trilogy has also (of course) Feruchemical and Hemaluric powers. Or do you think also them are effect of the Atium-Electrum alloy ? I mean the Feruchemical one could be debatable (also if it seems purelly in line with Ruin and decay) but the Hemalurgic one is actually the "I could steal everything" that is really unlikely to be an Alloy Effect.

Maybe the "One day from" in Vin's mind is with his movement skills. In the books It's stated his horseshoes trick made her faster than a horse.

Much more the Atium's economy was One of TFE's core from the beginning. While the Electrum as Allomantic metal was discovered only later (by TLR's researcher). On another note with the Metallurgic knowledge Scadrial had. They Will discover of the Alloy nature in a thousand of years. There are also others logical and pratical problems but I think this is already enough