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The next limited dragon is now available in the Winter 2020 event in Dragonvale. And it has a specific breeding combination.
Snowpocalypse + Shiver
Snowpocalypse adds Plant, Earth, Cold, Lightning, Air & Metal elements, and Shiver adds Cold, Air and Light. This means 7 elements are in the breeding pool, which makes an enormous number of possible offspring.
There is a total of 228.1% set breeding chances among the 92 possible dragons. So no regular