You're asking about Karak and the Ice golem ?

Here are the stats (collected from Gencon attendees)

Karak : Unique, Gold, Double base, Three blue dice, 4 health, +2 accuracy, 3 Ilian command, 1 Dark Symmetry Icon, 1 Art icon, allows an Ilian army to recruit non-Unique Brotherhood figs. But if he dies, all the brotherhood figs in your army take 1 wound.

He's sold with a unique item : Kark's command tent, which allows you to get 1 more slot in all three ranks. He also gets a lot of command cards which can only be played by him. A gold one allows him to get an additional action every activation, a silver one gives him 4 more health, another gold one allows him to resurrect when he's killed by sacrifying a brotherhood fig, and other ones give him flight (bronze) or Infiltration (bronze)... He can become a one-man army (though he'll be totally harmless against Vulkan prototypes immune to blue dice ).

The Ice golem is a Silver, Double base, two yellow dice, 6 health. He ignore ice terrain markers, but regains 2 lives when sitting on one. He has a special action to put ice tokens on enemy targets he manages to hit.

Ilian command cards are :

-Through the void (bronze, 1 icon, buyback 3 bronze) allows you to double accuracy on one of your dice.

-Summon golem (bronze, 3 icons, buyback 1 bronze) allows you to teleport one of your golems on an hex within LoS

-Shattering Blow (gold, 1 icon) Allows you to instant kill a unit with an ice token on it (ouch !)

-Freezing wind (silver, 2 icons) Roll three green dice. If you have sufficient accuracy, put an ice token on the target. Don't deal damage.

-Ice storm (bronze, 1 icon) Put an ice terrain marker on an hex within LoS. That hex is now hindering terrain.

-Chill touch (silver, 1 icon) Add a red die to your attack. If the attack hits, the target unit can't be activated durint its player next turn.

So Ilian will be an ice-themed faction, with a lot of tricks... The faction seems to be more "shooty" than Algeroth. Adding hindering terrain on the map is great, and instant killing figs is not too shabby either. A lot of Ilian command cards are 1 icon only, so all of Ilian's troopers will be able to use them.