I didn't say 3 cards to make a super card, I said 3 cards to make a random card - from any category (except permanent of course). The card could be a mercenary, unit advantage, unit subversion, unit acquisition, unit skill, diplomacy, etc... even cards only generated from the emporium). In fact, they could probably just reuse the same code that they use to generate the Emporium cards.
I don't build Wizard Towers now, I build Parliaments, Academies and Taverns. I don't build extra Academies because I desperately want the single extra point of research they provide, I build extra Academies because I want the cards they provide.
Having Wizard Towers also produce research points still won't make me build Wizard Towers instead of an Academy. While you're right that just adding research points to Wizard towers is the simplest way to change Wizard Towers, for me, that is not a change impressive enough to make me want to build a wizard tower.
You're right Rack, I don't really have a good answer to making it desirable to build more than one Wizard Tower, other than the shop idea. ... Factories have a limit of X units you can build. What if you could only gamble for a new card once per Wizard Tower per turn? But I don't know how hard that would be to code either.
