The strongest creature at level 7.

Yes, I've always thought the same. Crystal Dragons will lose in a 1-on-1 fight against many units, but it's the best unit from a tactical point of view, and it fits perfectly into the faction. Besides initiative, speed, flight, and decent damage, the most interesting thing is this unit's ability to reach valuable enemy ranged stacks even if they are well-protected by tanks (even if the tanks aren't directly adjacent to the ranged units, the Crystal Dragon can strike with electricity from up to three tiles away).