Brandon Sanderson
Elend Discovers that the Koloss have been left to Destroy, then Elend Executes Jastes
And here we have the scene where Elend Kills Jastes. This, more than anything, is a sign to Elend of the way the real world works. This chapter is a sign of innocence lost, and a measure of the price of idealism. Elend will never be the same man after this.
Some of my alpha readers rebelled against this scene, but–unlike the scene where Kelsier used Demoux to kill a man in book one–I decided not to cut it. This event says too much about what has happened to Elend, and it means too much to his character. However, I did arrange things a little differently. In the original draft, Elend struck and killed Jastes, then explained why he did it. In this version, he outlines Jastes' sins first, then takes his head off.
Now, finally, Elend and Vin have discovered Sazed's lies. Did you wonder about him sending the two of them off to climb the mountain in the winter? Spook was around to stop that, in case you were wondering.
And yes, Spook knew. Considering how long it took Vin to get over the fact that OreSeur knew about Kelsier's plan to die, you can imagine that she's not soon going to forgive Spook for this one. In his defense, he was pulled about between some very strong emotions and motivations, not the least of which being his uncle explaining that if he DIDN'T go, nobody would be there to explain the truth to Vin and Elend and keep them from trekking all the way to Terris. Besides, Spook didn't want to die, and this path offered him an escape. Can you blame him?
He'll blame himself. Book Three.