NHF – new heroes for Heroes V 3.1.

Should we implement Avran? Without the artifact stealing mechanic?

Probably, this isn't enough; it needs some refinement. And the specialization shouldn't be too random; instead, it should target the player whose city with a capitol (magistrate, town hall, etc., in descending order) is closest. If the closest city is the player's own, stealing should be impossible. Additionally, the player whose resources are stolen should receive a message indicating that money was stolen. The ability should be linked to a custom spell, so the player can click "Steal" in the spellbook, and voilà. The spell's cooldown should be in the player's own city. Also, any goblin can steal, so it shouldn't be tied to a specific tier (either all goblins or only tier 2 goblins). For example, 50 goblins are sent to steal, and they are either detected (with an interaction with the enemy hero closest to our hero) or the theft is successful, and they all return to the army with gold. Each of these points can be implemented with scripts. If it works roughly like this, it will be excellent. ;)

Added 33 minutes later
Here are a few possible outcomes of the theft:
1) They stole successfully.
2a) They were detected and killed.
2b) They were detected but not killed and brought back the money with the remaining troops.
3) They chickened out because there were too many troops in the castle and simply returned to the army. The larger the army in the castle, the higher the chance of them chickening out (being cowardly is characteristic of goblins).

The hero's level increases the chance of a successful theft, and the number of goblins increases the chance of a successful theft. Using the ability consumes the rest of the hero's turn.