In my game, the players are fighting each other but are also under attack by a common enemy. A lot of stuff is going on in the game, but during one phase "Faction Cards" are pulled from a deck and shown face up.
These Faction Cards can be either events affecting a specific player, a general event or an event involving the Common Enemy.
My problem:
I want the players to pull some, but not too many, of the Common Enemy cards each turn (they are about 20-40% of all cards in the stack). If too many are pulled, then the enemy gets too strong and if too few, then the enemy gets to weak.
My thoughts:
* I want to avoid having a separate deck for the Common Enemy, and would prefer to have one common "Faction Deck".
* Let´s say 3 cards are pulled. One way of doing it is to pull the cards one at a time and if a 2nd Common Enemy card is pulled, it is immediately removed and a new card is pulled. This could work, but I'm not a 100% satisfied. Any other suggestions?