I have been thinking about an attribute in my game. It is called "KNOWLEDGE". Originally, like other attributes, it was going to be a value of 1 to 9. Recently I have been thinking, that since the total value of attributes cannot EXCEED 20, I could make the "KNOWLEDGE" attribute from -5 to +5.
Why? Well I thought that NEGATIVE values could be for SCIENTIFIC knowledge and POSITIVE values would be for ARCANE knowledge... This could make for an interesting "duality".
From one perspective the game could have all that sort of D&D stuff such a magic and dragons, and from another perspective could have "real world" elements. Here is the thing... I'm not too certain what could be considered "scientific" knowledge and how it could work in a game which is "medieval" (knights and horsemen).
The only thing that comes to mind is a "catapult" which could give an army of knights the RANGED attack. Or a "battering ram" which could increase their strength.
More precisely two (2) distinct cards, one called "catapult" which gives melee armies the power to attack using range and one called "battering ram" which increases melee attack strength.