LBE – minimal balance changes for Heroes V 3.1.

- The Knight's super ability, "Relentless Force," has been enhanced: now, all units under the hero's command deal additional damage when attacking in melee combat (the effect of tripling damage from the "Vigil" ability remains), idea by RedHeavenHero.

This turned out to be a very useful ability; I like it. Previously, this "super ability" was practically useless.

Town Buildings:
- The cost of the Castle in an Orcish town is now 8000 gold, 10 wood, 10 ore, and 10 mercury (instead of 5000 gold, 10 wood, 15 ore).

10 mercury is probably too expensive... it's an unaffordable price, especially for Necropolis, since almost all buildings in the town consume this resource. As an alternative, you could make the "Castle" cost in each town unique, so that it requires 10 units of a NON-primary resource. For example, for the undead, 8k gold, 10 wood, and 10 ore + 10 units of any resource other than mercury; for Inferno, other than sulfur, etc.

Siege Engines:
- The base hit points of the ballista have been reduced by half;
- The base hit points of the tent have been reduced by half;

The tent doesn't have that much health anyway; it will just be blown away. Siege engines are already not very useful in most cases; I think it would be better to buff them instead (not in terms of HP)