Carosan Power Axe.
This nice upgrade is for anyone with a power weapon. The axe gains Breaching on a 5+ which makes it an attractive option for terminators.
Gifted to the Legion by the Alpha Legion, these weapons have a shorter range but make up for it with S+1 and breaching at 6+. This is fundamentally better than first edition.
This consul upgrade is essentially the eyes of Horus himself. As such, it is a very fluffy character to include in a Sons of Horus army -- or better yet: allied detachment -- which is where this character has been tuned up for.
If done in this manner, then the Emissary gives stubborn to the Sons in the detachment, along with a staff of dark authority. This staff serves not only as a power weapon at S+1, but gifts Ld=10 in a small bubble around the character when needed for morale or pinning tests. This is nothing to be sneezed at, and is a rather good upgrade for the points. Honestly, this character is great for narrative battles and should absolutely be taken.
Warpstone Flux Rating:
3/5 stars. (The rules are average).
Difference to First Edition:
Improved. (Can't ignore the much better banestrike weapon here, and the Dark Emissary is just cool).