Yata

Scadrial has no problem at all (maybe just the Hemalurgy if I am right about its mechanism) also the Awekening may be used without trouble, you can't easy obtain new Breath this isn't a real "Awekening needs Hacking off-world". About Roshar we don't even know if Stormlight is H&C's Investiture. If Stormlight is pre-Shattering Investiture, it will probably be a great fuel for every Magic System.

Well only Sel's Magic has a real problem to be used off-world. The others may be used without much trouble (the ones who need "Fuel" may find another source). But on Roshar something strange happens, there the Symbiotic Magic became stronger than any other place in the Cosmoverse. This "upgrade" may develops Power in outsiders Bonds (for example Seon's Bond) while they are on Roshar. Therefore probably what we see as "Knight-Radiant's Magic System" is powered over his "normal power" (something like AonDor inside Elantris), we don't know what they lost if they leave Roshar. Maybe their Surge became less powerful/flexible, or maybe they can't use the Shardblade/Shardplate in place where the walls between Cognitive and Physical Ream are stronger.

None of the God Metals are part of the "16 Metals of the Metallic Arts". Anyway the Alluminium's oddity must has something different than "He has a lot of Investiture" because in some Magic System the Alluminium doesn't resist at all better than other materials. Some (and at the moment I find myself with them) think that Alluminium has not Spiritual Ascpect and the cause of its peculiar effect is just this.

If I don't remember wrong the only WoB about Shardic Presence on the system is about "Ashyn, Roshar and Braize is the only planet in the Greater Roshar with Shardic Influence". But we can't say if on Ashyn there is some Shard or maybe in the past Honor or Cultivation was there before to going on Roshar.

Actually there is 10 Major Shardworld. A Major Shardworld is defined as " World with some number of Shards". A minor Shardworld is a World without Shardic power. As far as we know the only "easy" world to put in the Ten Essence table is Scadrial that surelly is the 8th world. Some other have "probably" place in the Essence's table but not so sure like Scadrial (and of course Roshar)

I suppose a Shardholder may does it, without any kind of problem (of course if somebody in the Shard's Intent don't prevent him to do something like that). For example Odium want to be the powerful being in the Cosmere, He can't give up his power i suppose.

The Command "destroy Evil" probably used many Breath more than commands like "take that". Maybe Vasher in the previous "tests" never tried to uses Command of that level of complessity (and Breath needed).

Syl is ancient, she was already bond with anothers KR (at least one) and she remembers to have helped men to kill. The Spren are Splinter, piece of Shard's power who gained Sentience. There are being like the one who you described, they are called Cognitive Shadow and they are quite the ghost of someone who for some reason didn't reach the "far place beyond the realms" like a Soul normally does. They may be called "Human's Spren" and stay in the Cognitive Realm, but they aren't the ones who bond with a Human to give birth to a RK.

I suppose he may creates a "puppet" to move and control like he wishes. But actually it will be just a remote controlled robot. He himself posses to much Investiture to actually reincarnate in Blood & Flesh, his own body was vaporizated from the Colossal amount of Investiture after all.

Yeah Pathfinder You have right in what I Wanted to say. If Kelsier knowed about the Gold-Atium nature of the Malatium, He would know The "Allomancy Rules" was wrong, and why He didn't tell to Vin (while he explained her that the "Superior Metals" have not alloy) or the Crew this information (He was planning his own Death after all). If I don't remember wrong, He has only that tiny bar and He ever said about creating more. @NovaSeeker Kelsier in the 11th Metal, just find a notebook about the possible existence of an Eleven Metal, I really doubt that that this Researcher have actually ever seen the Malatium, maybe just some kind of voice (spread by Ruin probably) and the creation of that bar was made also under Ruin's Influence. He obtain a great understanding of the Metallic Arts through the Well, He have to know about the God Metals and their effects. There are some theory about him using some Atium-Alloys to fulfill some of his feats.

We know only Roshar have 500 day in a Year, but no information about Nalthis's years.

Well but in minutes I suppose Elend may see the future quite with a lot of accuracy (after all, after his death the event goes pretty fast)

Probably the Asteroids have not Cognitive Aspect because nobody think to it as an Asteroid. If i remember right, someone ask to Mister Sanderson about "If the moon has a Cognitive Aspect of itself or because the sentient being define it" the answer was the second, without someone the Moon will not has a Cognitive Aspect. (Same think of a table made by machine, His Cognitive will still views itself as a tree or "wood").

Maybe they took the responsibility to avoid that something discovered what Gavilar wanted to do (about their old gods and the will of the king to contact them). They became a target for the hatred of the country and the Alethi didn't investigate on Gavilar's death too much. They have already the killer and the principals.

Yes also because Kelsier had no idea of the nature of the 11th metal (he didn't know it was an Atium-Gold Alloy). If he knowed something, He would explain something like that to Vin when He teached her Allomancy (and the "Superior Metal"). He also thinked to the Gold as Allomantically useless, and if he Knowed that his chance to kill TLR is in a Gold Alloy He would be more interested in Gold.

The reason of the "easy travel" between planets through the Cognitive Realm, is because in the space there is no sentience life to "generate its reflection in the Cognitive". In the Cognitive Realm, every planet (with life) is quite stick to some other planets (with life) because the "space between them doesn't exist".

There is some theories about, the mine is this.

Well if you guard something very small, it's ok.

In the Spiritual realm all the Time and Space is the same thing. There there is a "perfect version" of yourself therefore your aging can't change anything there. In the Cognitive Realm, probably your Cognitive Aspect ages together with you. Anyway I don't think your Investiture will be influenced by your age (also if in your entire lifetime, you may became an Allomantic Savant and therefore your power became more strong and your body more addicted to it).

You will be the worst night guard ever

I thought The Rhythms have Spiritual origin because they seems to be everywhere without any difference. I suppose the Listeners may actually "hear" some Spiritual Radiancy from some (or all with the right forms) Emotions' Spiritual Aspects (we know in the Spiritual Realm there is the "perfect version" of everything).

We don't know how the Terris people obtain the Feruchemy, maybe they have "extra Ruin" and this "unlocked the Feruchemy for them. Anyway I suppose that you have to meet the "Feruchemy's requirements" (like "be a good connection to Preservation" is a requirement for the Allomancy) but over the requirements you still has the ability. For example Rashek became a Sliver of Preservation and his Feruchemy didn't change at all (time ago I put myself on a Feruchemy's origin theory).

We have not a exact timeframe, but the Recreance happened before the Hierocracy end the Hierocracy ended 700 year before the books. Therefore when Vo returned, the Recreance was already happened.

Sorry I was really tired yesterday My point was (but after a little rest I change my mind): If your soul "knows" your right age only watching your birthdate, you will get old at the same rate inside or outside a Bubble. Therefore during a spacetravel, if a space-ship is inside a mobile Bendalloy-bubble (to move very fast in the space), also if the crew experiences all the relative Bubble-time, they age like if they weren't in a Bubble. For example: they travel for an year (external time) within a bubble with x100 time acceleration. Also if their experience all this 100 years at the end of the journey they are just one year older. This was my idea, and it worked within the Mistborn rules, until I though about other long-live-being in the Cosmere that broke this idea.

Probably Vasher saw only a Deadblade.