At the end of The Voluspa, another one of these  creatures comes from the dark crags of Nithafjoll and carries the body of  slain men - that one had earlier tasted the blood of murderers.
Saxo-Grammaticus describes how Friedleif killed this type of creature  on an island after digging up treasure - he had to pierce the lower half of  its body to kill it. At the end of The Voluspa, another one of these  creatures comes from the dark crags of Nithafjoll and carries the body of  slain men - that one had earlier tasted the blood of murderers. The  Gylfaginning points out that there are more of them in (*) Hvergelmir  than any tongue can enumerate. The most notable one of them gnaws at a root  and trades insults with an unnamed eagle using Ratatosk to ferry the  messages. For 10 points, identify this type of creature exemplified by  Niddhogg and one that encircles Midgard.
Saxo-Grammaticus describes how Friedleif killed this type of creature  on an island after digging up treasure - he had to pierce the lower half of  its body to kill it.
dragons [accept snakes or serpents]