NHF – new heroes for Heroes V 3.1.

As a novice modder, I can only offer ideas, and I just had a brilliant one: a powerful attack – a Sylvan elf with a main ability that, before the battle begins, paralyzes a certain number of units with roots for a certain number of turns, while also providing standard bonuses in such cases to the ents. The number of turns and the number of units entangled in roots, as well as the bonuses to the ents, would depend on the level.
We could also change the bonuses for the skill tree for added interest, so instead of the usual defense and attack, we could use speed and initiative, with a weak dependency on the level.