Icy Prison, Mass

You trap the target in solid ice. If the creature fails its save, it is paralyzed, if the target makes its save, it gains the entangled condition but can otherwise act normally. Whether or not the target saves, it takes 1 point of cold damage per caster level each round it is paralyzed or entangled in the ice. A creature can break the ice with a successful Fortitude saving throw against your normal spell DC each round after receiving the effect.