Destiny's Ice Prison

Pulling forth the large shard of eternal ice, you speak the evocation and thrust your hands out towards your target.  As the moister in the air thickens and coalesces about your target the Blue Ice is consumed utterly and a massive 15-foot-radius pillar of ice, reaching 30 foot into the air attempts to encase your target. Each creature in that 15-foot-radius, 30-foot-high cylinder centered on a point within range must make a Dexterity saving throw. On a failed save those creatures take 10d10 initial cold damage and are immobilized for the duration of the spell, or they take half damage on a successful save and escape the immobilization of the prison.

While a creature is so imprisoned it is unable to receive any further damage and is likewise unable to cast, speak, attack, or take any other action or move action with the exception of telepathic communication if it has such an ability.