Talk:Celestial Dragon/@comment-27136421-20151029223404/@comment-26243899-20151030151151

The Breeding Calculator list it as a possibility. Here is the reasoning behind this unexpected (IMNSHO lucky) spawning.

From Gemini (Zodiac type) info: "... the Zodiac type can split into Yellow and Black" and

"When the Zodiac type splits, any minor types within its components can also split. (True for Black). "

Black splits into Blue and Purple, hence Celestial (or any other Blue/Purple dragon).

HTH