Could I join the CotCO (Circle of the Crazy Ones) ?
I think somehow there must be a link between the Inquisitors and the Koloss but maybe not that obvious. Reading you gave me the idea.
Kelsier's brother (shame on me, I forgot his name) hated the Inquisitors but to get to know how to destroy them, became one of them. Now, changes occured in him that he didn't want for sure. He became bloodthristy and violent... as the Koloss are, please note. Hold to that.
The inquisitors have 11 nails in them and they all have the powers of full Mistborns eventhough they were not to start with. Now, we know that it is not hard to 'make' a mistborn, a simple swallow ! But what are the fonctions of those eleven nails ? I would suggest this : Each nail is made of a different metal. Being inside the body but yet visible on the outside (obviously not when they're dressed). Could it be possible that being inside the body a regular allomancer could not take power over eventhough they are also outside ? Could it be because it allows them to burn metal without having to ingest some right in the middle of a fight ?
Now the Koloss have only one nail. Bad memory to my account, I don't remember what Poor Breezie Dear burns... (bronze ?) that allows him to suggest or enhanced feelings. What would happen if that nail would be of that metal or its alloy ? Would it not provide a mean of control over the beast ? Isn't it how Vin takes control when she adds duralumin ? Doesn't she void all feelings ? When she takes control, they become docile and obedient, to her of course. How about if they would have that nail but not the capacity to burn it ? If it would be THE mean of control ?
Same for the inquisitors. Their blood thirst has to be explained somehow as a reaction to their allomancy. M... was not like that and hated them because they were. He wouldn't change intentionaly. It is obvious to me he just can't help it.
The idea with the Kandra is interesting but somehow... Like Vin could draw from the Mist and Kandra is linked somehow with the Mist, I do not think it needs a nail, just like the Mist does not need metal but can be a substitute, the Mist not being an invention of the Lord Ruler, that is. The Mist Spirit is also interesting to see. I was wondering, when Elend and Spook were coming back from the North, Elend sees the Mist often and comes to believe that it is not evil. Vin doubts because she saw it with a knife floating over him and she was sure it wanted to kill Elend. However, during their long walk back, the Mist was there, Vin not in the way, and it did not attack. To do so, it waited for Vin to be around. I have the feeling that the Mist Spirit has a mind of its own and that it's power is against the well's power. It needed a knight of somesort let's say, to fight its combat...
Moreover, in Mistborn 1, we have the journal of the so called 'hero of ages' that turned out not to be the One. In Mistborn 2, we have the account of Rashek's uncle written in metal because it is the only thing that is stable and won't change. The Hero would not have taken the power for himself, but Rashek did. All the prophecies (modified by the Lord Ruler over his thousand years - including those of the Keepers) did say, that the power was not to be taken by the hero... but Rashek did. Didn't the record of Rashek's uncle say that the power had to be taken ? Which is the evil one ? The Mist Spirit or the Well's power ? Which is the good one ?
I might not make sense very much... as I said, I AM crazy...