Shadowtog

I recently completed a re-read through Mistborn:Secret history. During the re-read, I noticed a vague reference to a potential 11th shard. Initially, due to my copy being an eBook, I assumed was a typo in the formatting of the book. Obviously if you haven't read the book by now this could give away something minor in the terms of plot. It has occured to me since that this is a reference to another possible shard. The theory behind this is that the names of shards is always capitalized wherever they appear in cosmere novels.