more info i forgot, event last from 16th august till 23rd of august, and you can only buy 7 day and 30 day avatars not the forever ones, with 30days beening costing the most ingame gold.
images of the avatars for each class, you can of course pick a diffrient color...
red(left side) High avatar; lvl 30 and above to wear.
green(right side) normal avatarl any level can wear.
