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The Masque dragon has been added with a specific breeding combination.
Moonstruck + Spritely
This combination of dragons has the elements plant, fire, earth, cold, lightning & air. An awful lot of dragons can result from those 6 elements.
53 dragons with a set breeding chance, for a total of 205.5%. The 1.5% is more than halved to 0.73%, which means 127 attempts for an even money chance to get one. 16.77 hours average fail time, means you need to breed