Due to recommendations here I started the event late, quite late, but still have my Greta. I bought 20 fire wolves just to make sure it was all manageable. And it has Been. Well done S8 For making a manageable event. Please please please make this a trend especially for the holiday season.
I also suspect Greta will be dropping earthen items only very rarely. Given all the resources that go into the earthen beams and blocks it is still worth it to spend a few days tapping on her to get one. I wish I had sussed how to get two of them. I sold my second one instead of holding onto it in the Forge. Oops! Live and learn!