Nadder Spines are an item fron Dreamworks: Dragons. They are the spikes from a Deadly Nadder's tail.
Chronological info Edit
First appearance: (I think) The Night and The Fury
Nadder Spines are yellow with a bluish base. They are around 2.25 cm. long. A Nadder Spine appears to be made of chitin, with venom contained inside.