Cage of Water

You send your target a little ball of water. When it touches, the target must make a Dexterity saving throw or the ball expands and traps the creature in a spherical cage made of water. You can move the cage 30 ft with your mind as a bonus action. The target can try to get out of the cage. It can make a Strength(Athletics) check every turn as an action. On a successful check, it gets out.