After using gems to get all the artifacts and the Ice Guardian, I had loads of Ice Dragons, Santa Dwarves and Elves. Time to go and ruin some peoples' villages!
The holiday event is now over, so I don't know if you'll be able to obtain this hero (Ice Guardian) another way or not.
I had at one stage, 2700/360 army - a ridiculous amount that could destroy any city, but I only needed 5-10 dragons at a time.
