So I have a macro that allows you to select a spell from a prompt and then it is cast, automatically displaying the standard "enemies take X damage" in chat. And now what I'd like to do is after the spell is cast, it subtracts it's mana cost from the user's mana bar. However, both @{CharName|Mana} - ManaCost and [[@{CharName|Mana} - ManaCost]] simply print out the equation and the result respectively, not altering the mana bar. Is this possible with only macros, or is the Pro API required (forcing me to subtract manually since It's unlikely I'll pay)?
