Ice Kingdom
From Wings of Fire Fandom Mirror

The Ice Kingdom is the home of the IceWings. It is made up of mountains, glaciers, and floating ice. It makes up the "head" of Pyrrhia. The Ice Kingdom is ruled by Queen Glacier, the queen of the IceWings.

When the dragonets crossed into IceWing territory in an attempt to find Mangrove, Deathbringer attacked the group, as well as Blaze.
Blaze has her own fortress near the edge of the kingdom, as SandWings aren't normally comfortable in very cold climates. Deathbringer also had his own hut, possibly indicating that he lived in the Ice Kingdom for a while waiting for the dragonets.
Queen Glacier's palace is at the far north on an peninsula. The palace is described to be having such low temperatures the dragonets wouldn't last a day there.