Dice mixed with cards

Actually for my game Monster Wars I have the battle system of my card battling to be much like this.

Each Monster has their own level of 'Power' and the way that battle goes is like this:
(Monster Power) + (d20 Roll) = Attack

If your attack is greater than your opponents than you win. The reason I did this was to make it more balanced as a game because it's not about which Monster is stronger all of the time, it's also about how your luck rolled for that turn. Most of the Monsters in the game around around 10-20 Power, so it makes it that most of the time if you roll a 20 you will win the battle. I thought that this added much more balance, and would make players feel like they weren't screwed if they didn't have 'the best Monster'

Yeah, I just wanted to keep it simple as I thought it was a little too complex to have each Monster have a different number sided die. I didn't really want to clutter up my cards with more things, but if you can figure out a way to do it without too much of a problem more power to ya.

I kind of am a 'keep it as simple as possible' person. I don't want there to be too much on my cards. Like right now I have a Power, Health, and Gold on each of my cards, on top of a Name, Type and their abilities and I think that's about all I want to put on them.

Although if I have to add an idea like yours to my game I would. I will have to test out my combat system a bit before I decide that. I haven't really tested out my idea of my combat system as much as I should have, which I am starting to regret right now.

I thought of adding dice to card games a long time ago. I think at that time, I wanted dice to be used as mana sources. You rolled the dice and told you which mana you had access. If used in a light doze it can be great. Another advantage of dice is that you don't always end up in a situation where there is nothing you could do because your opponent has a very strong card.

I know a game that combine dice and cards, it's called "Emmerlaus", it's made in Quebec and there is 2 versions of it. The first problem with this game is that the expansions unbalanced the game completely and the second problem regarding dices is that there are too many rolls.

For example, for each spell cast on you, you must make a resistance roll which consist in rolling 1D20 <= 10 to avoid the effects of the spell. So you must do this for every spell. Then if the spell pass, you need to assign damages. Damage gets multiplied by the rings your character can hold. So if for example you have a +3 power level, you need to roll 4DX, (die face determined by the card) add up the damage and subtract it from the player's HP (pen and paper OR D100 required to keep track of HP).

When playing with the old edition we rolled once and multiplied the value for damage, but in the second editions there were some cards that multiplied and other that asked for multiple rolls. So in the end, you had a lot of rolling to do and it became long and annoying. You also ended in a situation where you draw strong cards but it had little effects because either the enemy resisted the spell, or either you power level was so low that it had little effects.

So I think it's a good idea if you have the right doze of randomness. Rolling once per card, where not all cards requires a roll, should be the maximum rolls for a card game in my point of view.

This means that it would be resolved by diplomacy 2/3 of the time since you only get a die roll if both players has the same RPS value.

I have been using RPS system for my Ratscraft game idea too lately. In Starcraft, units have a varying value for attack/def on their cards. ex: average attack 5 but some cards have 4 and 6. But some units could have stronger values, like average 7, range 6-8.

Now it became an absolute mess to balance the strength of units because I need to compare range of values rather single values. So instead, I used fixed values for each unit + RPS. RPS determines if you hit, miss or both hit each other. Then you compare firepower and health to see if you actually kill the enemy.

The second interesting idea is that you don't know which card is stronger than the other since the result of the RPS is relative to the target's RPS value. So players cannot easily place back the strongest cards into their deck.

Still, the key of using an RPS system is having a hidden information game. Because if I know I cannot win, I will not attack. In my system, players target blindly, but once targeted, the cards are revealed. So it gives the opportunity to another unit with the right matching RPS to make the kill.

You -could- end up with a more balanced game. In practice, however, most games that incorporate both random draws from a deck and random rolls from a dice are just multiplying their randomness.