One more question related to this... is it a one time chance at a ceratin level/time... or can we do it over and over.
Thanks again...
Once you obtain your own battle tower, you can reskill as many time as you like through your skill trainer, with some payment of course. The cost start from 5k gold for the 1st time, and will keep double up each time your reskill, eg 5k, 10k, 20k, 40k and etc. The gold wont be a problem if you know how to earn it, as its really easy to earn gold once you obtain battle tower.