If you can see a ninja, chances are you're already dead (and if you can see them while dead, skip ahead to the zombie section). I don't want to give away the secrets or anything, but most of what this faction does is sneaky, happens fast, and at the last second. So look out for that.
Check out our blog post here:
Game Data Overview
If the synergy table looks a bit empty, come back later as we are slowly going through synergies. Also, to better understand how we define how a faction synergizes with another, check out our Synergy Definitions page!
Check out these other faction(s) that were released in this set: