Just use event - unit finished casting an ability.
Conditions - Ability begining Cast is Equal to (The skill)
Actions- The actions of your trigger for the spell.
gah...ok, here's the situation...hero starts at level 1, i want him to stop leveling at 3, but i dont know how to work it...i cant find a comparison of 'hero level = 3'...
Check the integer and boolean comparison for that.
I guess it's an integer ...
Event: Integer (Current level of HeroXXX) becomes bigger than 3
Action: Set experience gained for HeroXXX to 0%
Action Alternate: Stop experience gain for HeroXXX