Koloss are something I’ve been trying to work in for a time. Originally, in the very first draft of Mistborn one, I had them make an appearance in the prologue:
The skaa worked the fields with the lethargy of the hopeless, their motions methodical and listless. Though the sun’s light was darkened and ruddied by the ever-present smoke, the day was still oppressively hot. Yet, no skaa man paused to wipe his soot-stained brow—being seen resting by a koloss fieldmaster would invite a whipping.
So, the skaa worked. Eyes down, watching the dirt by their feet, they dug at the weeds—daring not to speak, barely even daring to think. Koloss stalked amidst them, blood-drop eyes alert for signs of skaa laziness.
Obviously, I changed their place in the world drastically. During the drafting of book one, I was still working out what I wanted the koloss to be. I knew they were going to be something monstrous, and as the first draft of Mistborn One progressed, I slowly cut them from the book and decided to save them for book two. As the characters talked about them, the koloss reputation became more and more nasty—and I went so far as to explain that the Lord Ruler himself feared to keep them near human settlements.
So, when it came to plan book two, I put a lot of effort into developing the koloss. I wanted them to be cool visually, live up to their reputations, and work within the worldbuilding and magic of the setting. You’ll find out a lot more about them as the series progresses.
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