NHF – new heroes for Heroes V 3.1.

Are these pirates from NCF?

Here's a suggestion:
Knight (no name yet) specialization description: When the hero captures a building for recruiting creatures that doesn't belong to his faction, it transforms into a building of the Order faction of the same level. This will require spending some resources. Also, if an enemy hero tries to capture a building, they will be engaged in combat by a guard, the size of which depends on the hero's level. But if they win, the building will return to its original state without returning the resources.;)