Nidhogg
Nidhogg (Old Norse: Níðhǫggr, [ˈniːðˌhɔɡːz̠]; older Icelandic: Níðhöggr, Modern Icelandic: Níðhöggur) is a Germanic dragon in Norse mythology who is said to gnaw at the roots of the world tree, Yggdrasil, and is likewise associated with the dead in Hel and Niflheim. == Etymology == While the suffix of the name, -hǫggr, literally "hewer", clearly means "biter, striker", etc, the prefix is not as clear.