I got a Crystal Unicorn too. In 24 hours of trying, got 45 hours!!! I used Rainguin, and Solar Simian!!! Both were level 7!!!
Click image for larger version.  Name: image.jpg  Views: 131  Size: 22.5 KB  ID: 14455Click image for larger version.  Name: image.jpg  Views: 112  Size: 21.1 KB  ID: 14456Click image for larger version.  Name: image.jpg  Views: 101  Size: 22.3 KB  ID: 14457