Wall of Frost

is a Destruction (Skyrim) spell of Expert Level. It costs 80 mana per second of casting (equivalent to one square of wall) and must be sprayed over the section you wish to "block off". deals 50 damage of frost to any enemy who passes through it each second. This damage is not increased by the Augmented Frost skill Perk, and does not harm the Dragonborn or their companion.