Board Thread:Breeding Questions/@comment-25607150-20141120160202

I'm dying to get this Dragon. I got 7 Howl from Fallen Angel + Gummy. I used Apocalypse + Gummy and got 50 hours breeding. I thought it was Promethium, so I upgrade the San to lv7, without seeing the egg, it was Abyss. I used another combo, Fallen Angel + Howl, and got 3 Acoustic Dragons, but not Promethium :(

Could anyone give me a suggest ?  