Considering the specific nature of this hero (I know where he/she comes from), an alternative specialization could be suggested, something like a goblin ability, but it should work differently. In a battle with this hero (Sylvan), an enemy unit whose numbers have dropped to a certain percentage would switch sides. But most importantly, I think the hero should be given a different name; it's not good to completely copy heroes/characters from other games/universes. Overall, the idea is great. And as a follow-up, I often read your forum out of interest and have seen many posts requesting the addition of forest elves or something similar (they really aren't in the game). Why not give the people what they want instead of creating yet another set of identical necromancers, demons, etc.? This is just my opinion.