NHF – new heroes for Heroes V 3.1.

It would be possible to add a level-based bonus to the damage from Chaos magic (if it’s feasible), because we shouldn’t forget that Hellfire drains some of the hero’s mana, which means the hero who receives this ability should be focused on magic.

Added 48 minutes later
It’s a pity that heroes can’t be given creature abilities. We could come up with something else.