Chains of Ice

You create chains of ice which condense around a creature and attempt to pin it to the ground. The target makes a Dexterity saving throw. If it fails, it is restrained for a number of minutes equal to your Charisma modifier. If the creature was flying, it falls to the ground and is restrained there instead, taking falling damage as appropriate. The target can use its action each turn, to make a Strength check (DC 15) to break free.