NHF – new heroes for Heroes V 3.1.

I would like to recall that there used to be several specializations that were popular, but are no longer available.

Octavio
Octavio was a renowned warrior of the Unicorn Empire, but one day he was ordered to destroy an defenseless village. Many innocent lives were taken by the warrior's sword, but as he raised his weapon over another victim, Octavio could not strike the small, defenseless child; he was killed right in front of him by another warrior. Returning home, the sinner entered a monastery, confessed, and took monastic vows, and wanted never to fight again, if not for the demons again.
Monastic Vows
The hero can retrain swordsmen into inquisitors and adepts. The cost of training decreases with the hero's level.

Muazir
Lost with a small army, Muazir stumbled upon elementals of all kinds. Spells could not break through the creatures' defenses, so the hero suffered greatly. "If only I could use my mana to create weapons and armor for my army, instead of these pathetic spells..." - Muazir sighed. Thought and done! After a few years, having studied all the libraries and visited several secret places, the hero was able to master his idea, and no elementals were scary anymore.
Battle Mage
The hero can increase his attack and defense before battle at the expense of mana. The remaining mana and the amount of the bonus depend on the hero's level.

Eymund
Eymund was born into a family of miners and was taught hard work from childhood. One day, dark elves captured the settlement and took control of all resource extraction in the hero's native settlement. Sneaking into the mines at night, Eymund disabled several shafts. The supply for the Warlock offensive decreased, and the army began to retreat. When troops arrived from Greenhaven, Eymund easily restored production and joined the army.
Engineer
The hero disables mines, after which they must be repaired for gold. Eymund can do this for free. The operation takes the hero's remaining turn.

Avran
Avran repeatedly tried to convince his fellow tribesmen that before attacking a rich city of mages, it is worth improving his financial situation, while also damaging the enemy's. The orcs did not accept his proposals; only the loyal goblins agreed to the risky undertaking. And although the goblins succeeded and brought more than half of the enemy's treasury, the other orcs look at Avran and his goblins' raids with skepticism.
Thief
Once a week, the hero can send 100 goblins to steal enemy gold. To do this, the hero must be closer to the enemy city than to his own or allied city. The amount of gold brought the next day depends on the hero's level. There is a chance that the goblins will get scared and not bring money, or that the enemy hero will notice them. In this case, the gold will be brought when the goblins defeat this hero in battle.