Talk:Sapphire Dragon/@comment-22956772-20130927053808/@comment-11437884-20130930165420

That depends on what you call "breeding odds".

Upgrading your Island will not improve the fact that Mountain + Rain will produce Sapphire in 3,5% of your breedings. But upgrading your Island reduces your breeding times in 20%. That means that you will have an avarage of 25% more breedings than you would have with the normal Island.

When you have more breedings, you have better practical breeding odds.

Think about it: The odds of getting heads at least once when you flip a coin 5 times is higher or lower than when you flip it only once?