Finished tournament with no gem spent, however I had 23 attempt against nightmare to win. (Second "hardest" animal took 4 try to win.)

But to my surprise, I run out of quest time, just hatching the egg. It is really stupid thing to make the quest timed also, because not enough just to win tournament, you have to hatch the egg also before official tournament time closes.

My thoughts:
- You have to have a decent army upgraded (15) for next time
- You have to have much time (fight hourly, sometime in nights as well)

- Or be prepared to spend a lot of gems

- There is no 3rd choice (well, you may be lucky, winning in 30 rounds, not loosing a battle )