Talk:Battle Arena/@comment-13358377-20130810002659/@comment-4830404-20130810003135

I used my Big Bad for it. If you've got rarer Black dragons like Night Elf you can try that too, has same chance as Lotus and Onyx there. Unfortunately the chance is only 55% if your dragon is level 10. Can be lower if you've got lower levels.

I would not use the Ultimate for this, personally. 55% with a lv10 is still not awful, you can get it after a few tries. If you've got limited gold, I would save for the nasties that are 30% chance or worse.