From the release:
Finally. the world of zO has some new inhabitants
The Emerald City Guards are the equivalent of the shock troops of zO I guess. They're also terribly nasty and mean to all and sundry - as you might be if you'd had your head cut in two, your eyes replaced with tubes of emerald, and a speakerphone instead of where your mouth is supposed to be!). Wonderfully sculpted by Bob Naismith, these are one-piece castings in high quality resin.