Icestorm Island

Icestorm Island is a island seen in School of Dragons.

History
According to the petroglyph that Skulder the Archaeologist had found on the island, the Vikings that had made it there home coexisted with the island's Groncicles and build statures of them.

Hiccup, his friends and the player's Dragon Rider avatar discover the island when they were nursing a baby Groncicle on the School of Dragons island and later followed it, as the hatching was draw to the coldness of the island. Once they saw the island, Hiccup and the player deiced to go and explore it. So they learn more about their little in it's proper habitat and make that it is back to full heath.

Trivia

 * At some point Mildew and his sheep, Fungus had moved to the island, so they could get away from dragons.
 * On Berk and Outcast Island.