if u cant beat vez'nan, an easy way to kill him is use mostly mages....upgrade all them(sorcerer mage) to have the rock element(max), and have one building full of knights near the exit.... when he turns into his last form...every hit he takes will lose 200 hp...like if this helped
at dedo5 and others....one of the easiest ways to win is to do the extra challenges in each level, after, you'll get 1 star for each including the stars u get in that level....upgrade/buy a hero....and it should gradually get easier on levels like lvl 9
This game is pretty good but there's 2 things I recommend changing. 1.Save button, and 2.after a failed level we could go back to the shop and actually have a better chance of living. + if you agree.