Any single black element and single purple element will do. (e.g. Night/Magic) In my experience, I managed to get some of the neo zodiac dragons using the simple combos. Hope this helps!
Oooh so just use black and purple?
You can do it! I was unable to obtain the Neo Dragons but three: Neo Aries, Neo Gemini, and Neo Leo. I really tried my best with Neo Leo since it is my zodiac. I hope this Neo Zodiac thing will come back next year. Hopefully, they will use the line goals so everyone will have a chance to get it!
Island Name: Amer Island
1883+ Unique Dragons Hatched
409+ Unique Dragon Eggs in Storage
I'll go ahead and try for this one but I don't have high hopes. I've yet to breed a single Neo Zodiac dragon despite using both the den and the roost the entire week they're available. There's no reason not to try since I've got nothing else to breed for but it's still disheartening to constantly try and fail. I think they should be available for more than a single week -- the zodiac sign cover a full month so why not have the dragon out for that long too?