I played an Aqua Booster card that states "Your total Fire Power increases to 7." I read this to assume that the total power for my CHARACTER card increased to 7 since it is a booster card. I had 3 other cards in my support area already, and announced my total fire power as 13. Was this correct? Or should my total fire including support cards only have been 7? Thanks!
Your TOTAL Fire Power is increased to 7, so the power of your attack is 7. If you have already a total fire power above 7 this card has no effect, i.e it does not reduce your firepower.
Hope that helped,