You trap the targets in solid ice 1 inch thick per Caster Level. If the creatures fail their save, they are helpless, but can still breathe (the ice blocks line of effect to the target). If a target make its save, it gains the entangled condition but can otherwise act normally. Whether or not a target saves, it takes 1 point of cold Damage per Caster Level each round it is helpless or entangled in the ice. The ice has hardness 0 and 3 Hit Points per inch of thickness; if broken, the Creature is freed. A Creature can break the ice as a full-round Action with a successful Strength check (DC 15 + your caster level).