You attempt to control a person. It must fail on a Wisdom saving throw or do cold/ice magic for the duration to stick with the target. If you or creatures that are friendly to you are fighting it, it has advantage on the saving throw.
The longer the spell is on a player, the more the spell takes over the target until the caster is fully mind controlled.
While the target is affected, you have a telepathic link with it. You can use this telepathic link to issue commands to the creature while you are conscious (no action required), which it does its best to obey. You can specify a simple and general course of action, such as "Attack that creature," "Run over there," or "Fetch that object." If the creature completes the order and doesn't receive further direction from you, it defends and preserves itself to the best of its ability.
You can use your action to take total and precise control of the target. Until the end of your next turn, the creature takes only the actions you choose, and doesn't do anything that you don't allow it to do. During this time you can also cause the creature to use a reaction, but this requires you to use your own reaction as well.
Once this spell is stuck to the target it is unremovable until the caster is killed.
(The Caster must have five or more Ice related moves, or the caster speaks draconic, or if the caster is a sorcerer with draconic bloodline)