NHF – new heroes for Heroes V 3.1.

...probably on all the lizards... The nightmares turn out badly... The nightmare itself doesn't fit as a mount because of some growths on its back. And its animations are bad and there are few of them....((((

So why take a nightmare if you can take a horse from a Haven hero and replace its head with the one from the nightmare (by the way, in Heroes 6, the Inferno faction rides not on a nightmare but on a "regular" horse).