Alright, so i'm also trying to get this one using Night 7 x Blue Moon 4. I got common fails, winter and luck x3 times or so even with boosted breed on. Yesterday, I got Mistmoth and then after Disco became level 7, I swapped Blue Moon with it. This morning I got Celestial (even forgot to push the boosted breed button, lol). And now I'm having 14 hrs of incubation time and it might turn out to be a Night Elf / Seafarer. Either way, I'm glad for the present outcomes since i don't have any of these dragons. I'm very sure that my luck will run out really soon though! xD