An immobile, translucent, wall of ice springs into existence.
The wall can be any size up to 1,200 square feet and may be shaped in any manner and to any dimensions the caster desires. It may be a straight wall or curved into a protective circle.
The wall must rest upon a solid surface and may not be evoked so that it appears where objects are.
The wall of ice is impenetrable to monsters with fewer than 4 HD.
Monsters with more than 4 HD can break through the wall but suffer 1d6 hit points of damage when doing so. The wall deals double damage to creatures that use fire or are accustomed to fire.