Board Thread:Game Discussions/@comment-26513944-20150814075002/@comment-26439481-20150815114549

I saw on youtube a video where somebody spent 20.000! gems in opening 1040 chests and I think she got 9 DF:s. So the chance is very low, and none of them were a + version DF. It has been speculated here on the wikia, that the base chance is maybe 0.1%. And as Aranielle wrote above, the chance is always counted seprately, thus spending 2000 gems won't guarantee you a DF. If you spend over 10k gems, you most likely get one, but even then it is not guaranteed. Chance chests are always a gamble. I don't normally spend on them, as the chance is so bad.