Wall of Ice

Wall of Ice
Caster Level(s): Wizard / Sorcerer 4, Cold 5 Innate Level: 4 School: Evocation Component(s): Verbal, Somatic Range: Medium Area of Effect / Target: Area Duration: one round / 2 levels Save: Reflex Special Spell Resistance: n/a

A wall of ice cannot form in an area occupied by physical objects or creatures. The wall obstructs or narrows the passage of nearby creatures, forcing them to bottleneck or find an alternate route. Creatures may attack the wall to force passage through. A wall of Ice has 20 AC and 200 HP. It is vulnerable to fire, but not to cold. Its surface must be smooth and unbroken when created. Any creature adjacent to the wall when it is created may attempt a Reflex save to disrupt the wall as it is being formed. A successful save indicates that the spell automatically fails. Fire, including a fireball spell and red dragon breath, can melt a wall of ice, and it deals extra damage to the wall. Melting a wall of ice creates a great cloud of steamy fog. Only one wall of Ice can be conjured by the caster at the same time.

Gameplay Notes
The wall does not persist if you leave the area, to avoid griefing issues.