@LeetSkillz - So, then I missclick my Fire Pillar and play Steam Drain by accident, and as a result lose the card completely and have no effect happen because I don't have the extra 1 fire quanta? No.
@GoldErastros - Interesting idea, but as you've heard: we cannot have cards which cost x and y quanta. There is no code in place to handle this. I'm no coder, but I'm going to hazard a guess that when you click a card to play it - the game checks it's Element, then checks it's cost and runs a comparative check against the corresponding variables of that Element and checks if it is equal to or higher than the cost of the card. If the checks return True then the card is played, if False you get the error message.
So, the problem arises in that the card you want to play is two elements, which will cause the game to check two integer values (and the two element values), and then to run the check against two stored variables - your quanta of each element, in this case Water higher than or equal to 4 and Fire higher than or equal to 2 - and then, it will check to see if A = True AND B = True, and if either A or B are not true then it will give you an error message, or play your card. This all equates to a lot of checking and passing of variables, and quite possibly loops and conditional statements which all will cause the game to 'pause' and 'think' as it were.
And, I'll hazard my final guess that Zanz wants to create a fluid and fast moving strategy game which causes you to think on your feet - and as such, 'pausing' and 'thinking' (on the computers part) is the last thing he wants.
@Delreich - sure, it will be a lot of effort! But hellishly cool. But if Zanz chooses to go that route and open that door, can you imagine the hundreds of new card idea's we'd have for 'dual' cards? Then the corresponding mess of trying to sift through what is good and what is useless, and then the testing, implementing and balancing of these new cards... Chaos... but we can dream
