Board Thread:General Discussion/@comment-24991512-20160422212503/@comment-26886747-20160502012846

Melkov wrote: Just for a record, I've got 4 rare ghazts on Ethereal Island in approximately 20 attempts (1st one on the 1st sttempt). All monsters are lvl 15, all 2-element ethereals are available, as well as ethereal wubbox, and of course 10 torches lit.

So I think that 20% success estimation is quite reliable, at least for that setup.

Players who were unlucky to get 2-element ethereal on their first attempts actually had much fewer (than 20) breeding attempts. Spending a lot of diamonds didn't help them too much because clearing off just one 2-element costs at least 60 diamonds. Reported spending of 250 means that just 4 were cleared. The 20%, of course, would only apply to Ethereal Island, right?