One of my favorite events. My wife is like a puzzle master and kills at this thing. Great event to get tons of daily specials, and even better that there are some new daily specials this event that will be useful. Also, I get that you have to put in the time to research strategy and play every day for some of these events, but I don’t think I’ve missed out on the final building in two years and I don’t spend diamonds (I haven’t been getting the gold upgrades to start, but I get them eventually from the silver building). That’s all to say, I would be surprised if we can’t also get this building with no diamonds.