NHF – new heroes for Heroes V 3.1.

1) "Smuggler"
For each artifact found by the hero, additional gold is awarded. The amount depends on the rarity of the artifact and the hero's level

Added 9 minutes later
2) "???"
For each mine captured from an opponent, the hero also receives a certain amount of resources that it produces

Added 11 minutes later
3) "Mobilizer"
At the beginning of each week, the hero receives reinforcements of creatures of levels 1, 2, and 3, equal to one-third of their standard weekly increase, but only if he is in a castle and his level has increased compared to the previous week.