Board Thread:Questions and Answers/@comment-6696478-20140710192955/@comment-25087059-20140725051039

Totally agree with Evac. Don't waste the diamonds unless you get to the very end of the season without success.

The combination is clearly posted here on the wiki, so you know what you need to try. From the data I've collected from a bunch of people so far, 13 Hoolas were bred in 70 attempts for a success rate of about 19%. To put that in perspective, that means if you were to try 10 times in a row you would have an 88% chance of getting one.

If you keep trying for a while you're sure to get one and not have to waste those precious diamonds (that's almost a month's worth of mining!). In fact, you'll probably get several. So far I got two on Air and one on Earth.