NHF – new heroes for Heroes V 3.1.

Or even something like this:
Campfire (name) - every evening, Tyris lights campfires that attract lost orcs, who gladly join the squad.
+1 creature from the Stronghold every day, the level of the creatures depends on the hero's level (this can be calculated in more detail later in proportions).

I like it. Only the name of the special ability probably needs to be changed.
Maximum Level - 40.
40/7 = ~6
Normal game level - ~21 (so that it is divisible by 7 - creature levels). But the game time is quite different, the uncertainty is very high, so let's discard it.
For every 6 levels of the hero, the level of the creature received increases (if given every day).
Minus: a very strong late-game hero, although this won't save him from the Dungeon anyway.)
At level 6, a cockroach, for example, will help Hage.)