Third Bondsmith Spren

[Ishar]

So I have been looking at peoples thoughts on this in other topics, and most people seem to be in agreement that the third bondsmith spren is a combination of Honor and Cultivation. I know this is very unlikely, (but I have learned to expect he unexpected from Sanderson) but is it possible that the third bondsmith spren is not of Honor, Odium, or Cultivation, and is instead of a different shard that isn’t on Roshar, but has a splinter that just happens to be on Roshar for whatever reason (similar to Patji)?

Edited April 1, 2018 by Ishar

[RShara she/her]

I think the introduction of a 4th Shard would be very unlikely and confusing at this stage of the story.

[Ishar]

I am not saying an entire 4th shard, just a piece of a 4th shard.

[RShara she/her]

It would still be introducing a 4th Shard into the mix.  It would need to be foreshadowed, tied into the narrative, given a name, intent, etc.  I don't think it'd be a good narrative choice.