It is a very strange RTS, with deckbuilding, the complete absence of Fog of War, limited resources (and not like Starcraft, things do tend to run out).
And well, units have not only a "money" cost, but also you need so called "orbs" of the right color (fire,nature,frost shadow), to be able to play them. There are certain units which require combinations too.... (Like 2 shadow 1 frost, 3 fire 1 nature etc.)
Looks simple, huh?
