Prison of Ice

A permanent 7-inch-thick wall of ice lines every inch of this stronghold space’s outer walls, ceiling, and floor. Each 10-foot-square section of the bulwark has 21 hit points, and requires a Strength check (DC 17) to breach with a single attack. If a section of the prison of ice is breached, it repairs itself in 1d4 minutes.

Fire deals full damage to the prison of ice, instead of the normal half damage for objects. Suddenly melting a portion of the prison creates a cloud of steamy fog that lasts for 10 minutes, after which the ice reforms instantly.

Caster Level: 7th; Prerequisites: Craft Wondrous Item, wall of ice; Market Price: 14,000 gp.