Frostmarch Glacier

Glacial Ice was the Key feature and danger of the Frostmarch. Its evergrowing reach was concern for Reman II, who deployed the Elite Mercenaries The Hosts of the Horn to resolve the expansion.

Creation
It is believed that the Glacial Ice is created when the Ice-Gyre is fired at a particular spot on Nirn. The Grand Frost Mage created the first Glacier across the Jerall Mountains, presumably to block Imperial Movement up to Skyrim, damaging Reman II's ability to reinforce his front during the Four Score War.

Effects
The Glacial ice is unmeltable, and unbreakable. Evidenced by its steady expansion into the Alik'r Desert during the First Frostmarch, it is seemingly unaffected by even the most intense of Heat. During the First Frostmarch, Reman II attempted to Mine away the Ice for his own Personal use, but the ice didnt seem to chip when struck by Pickaxes.

The Glacial ice brings with its expansion intense, Snowy weather that often continues until the Ice is Vanquished. During the First Frostmarch, the Glacial Ice came close enough to Imperial City that Lake Rumare became frozen over with ice, and Snow piled on the footsteps of the Imperial Palace.

It can also be noted that any Organic matter or Lifeform in the Path of the Glacier who becomes unlucky enough to get trapped under it will be frozen completely solid, but retain a sort of Bodily Status due to the deep freeze.

The Glacial ice has a single weakness, the Sword Frostbane, which Reyenirus Battlehorn used to cut a swathe through the Ice and its creatures.