Season Two of Korra gets kind of a bad rap and a lot of the blame usually falls on Unalaq. Compared to some of the other villains, Unalaq isn't as flashy and even the show creators themselves poke fun at him in the season four episode "Remembrances". But I think he fits the tone of the season.
And to me, he's not the least of the villains, but I'll save that complaint for another time.
What makes Unalaq stand out to me, besides the whole "Dark Avatar" thing, is that his plan, more than the other bad guys, is partially correct. He wanted the spirit portals opened, and that led to the integration of people and spirits and the rebirth of the Air Nation.
Not bad for the "worst" villain.
Heroclix Ebony Maw and, I didn't realize it when I ordered it online, but Ebony Maw doesn't have a nose.
So, not only did I have to use green stuff to fashion his hair and cloak, but I had to make a nose.
Also, Ebony Maw is holding a skull for some reason. I thought about converting it to water or something, but decided that of all the Korra villains, Unalaq *is* the most likely to have skulls sitting around. After all, he did have an I'm-obviously-evil throne to chill out in.