After 1000-0. Into the hero stat. 3-4 row top or bottom. There is also mofifier for energy boost 1,0 (you can cast extra quick if it'll be 10,0) but then "something went wrong with the battle etc". And i've found that some numbers are duplicate HP, EN,... But there is no "something went wrong with the battle etc" if you loose))). I've made some GG cheats befote lvl 60 of my heroes, and my level before 25))) Maby there must be another way to cheat in income resources (exp, lvl, coins) when they grow/spent?