From Creatures Wikia
The Ice Dragons are a genetic norn breed by Grendel Man which makes use of the Draconian Norn sprites. They are based on the magma genome. However, the ice dragons are the opposite of the magma norns-they love cold weather. They also make good grendel hunters, and are mostly carnivorous.
- Hint: Try raising Frogs for the ice dragons to eat.
Ice Dragons can be obtained from Grendel Man's section at Creatures @ CU7.