The Frozen Groncicle is a subspecies of Groncicle that are born in the coldest, oldest glacier ice.
"These reclusive Groncicles look like they're carved out of the coldest, oldest glacier ice where they're born. Their eggs are great for keeping food cold, but the eggs hatch faster when they're close to snacks."
The Frozen Groncicle appears similar to all other Groncicles in Dragons: Rise of Berk, but it is pinkish purple in color and has plates upon its back. They appear to be carved from the coldest and oldest glacier ice.