Flamesilk

Flamesilk is a rare event that happens every so often in the SilkWing tribe, and it has some extraordinary effects on the dragon.

First, before the dragon’s metamorphosis stage, the SilkWing’s wrists will glow somewhat like embers, and it hurts. Second, when the SilkWing begins to spin its cocoon, the silk that comes out will not be like normal silk. Instead, it will be more like a bright, glowing silk on fire; this type of silk is called flamesilk, and is very expensive. Third, when the dragon comes out of its cocoon, it will be completely immune to flamesilk, but not fire.

According to The Lost Continent, It was mentioned by Cricket that if one of the dragonets parents is a flamesilk, the dragonet has about 50% chance of being a flamesilk.

Known Flamesilk's
Blue, Luna, Admiral, Whitespeck, Danaid, Xenica, Fritillary, Clubtail, Festoon, Heliconian, and Pierid.