This egg looks like origami and has the appearance of being perfectly folded.
As a Plia caterpillar crafts its cucoon to transform itself into a beautiful butterfly, the Plia folds itself inward like origami. When it comes time to emerge, the Plia doesn't poke or crack through its cucoon. Rather, it unfolds, too.
The pattern on the Plia's body has been found in ancient, buried ruins across the island. Some say that it may be evidence of an ancient Arkian civilization and that the Plia is one of its only remaining descendants.