I think it says it is part of the "essence of what fell from the heavens in prehistoric times", though to be exact I think we would need to have ZeaLitY in on this (ZeaLitY, help us out here, please?). But, whatever; it's an artistic licence I took, that's all. I thought it looked neat, rather than the typical big porcupine. Plus it was a submission to a fanart contest where the topic was "the Frozen Flame", which itself is kind of boring.