While running 25 Heroic MSV with a friend we found that in the Spirit Kings boss the 4th King won't become attackable, and the other three will continue their spells.
One of the three parts of the boss that use spells uses one that allows you to damage your own raid until you take some damage from one of them, basically allowing you to kill them if you don't take any damage.
So I decided to kill him and hearth out to reset the instance, and when I did it I earned 14 honor (and 18 honor when we tried and failed to kill the boss again)
I'm not sure how hard honor is to get with this new system, but this could be something useful to someone? I assume it's an exploit as it is killing people from your faction for honor, but if it isn't feel free to delete/move it mods.