[BNW] How to remove generic promotion for specific civ?

[lucaspalasios]

Is there a way to remove a specific promotion from units for a specific civilization?

My idea is to remove the "Penalty Attacking Cities" from mounted units of the mongolian civ. I know that a simple way to do it is to add a promotion with a bonus against cities to nullify the penalty. But isn't there another way? I'm not a lua modder, but I suppose with lua it could be done, right?

 

[LeeS]

Those would be the two ways to do it.
Probably adding an "anti-modifier" promotion to Mongolia's Mounted UnitCombatType units via an addition to the trait in table <Trait_FreePromotionUnitCombats> would be simplest.