Talk:Arctic Dragon/@comment-24882245-20140520015623/@comment-5835936-20140522120651

It's not about how common it is. Several things change the odds, and we don't fully understand them all, so largely the sandbox excludes them. What it concentrates on is the average fail time. The shorter that is, the more times you can breed in a given time. And no matter what your combo is, breeding more times gives you more chance to get your goal. That's why it suggests including water, because it adds the shorter mud, ice and iceberg to the fails. The chance for arctic doesn't decrease, because the combo doesn't change your chance for a rare dragon unless the uncommon rule is now true for golden hybrids, but now instead of getting 10 or 14, you can get 6 or 8 or 8 or 13 as well. This lowers the average time you'll have to wait before breeding again. For example, you may have been getting lots of mountains before, but now if you get two muds, or a mud and an ice/iceberg, you can breed twice in that same amount of time! Hence getting you the dragon faster.