Born in the North

Like the ice you are born from, you have begun to harden your body to make yourself harder to break. You gain the following:

• When a creature within 5 feet of you hits you with a melee attack, you may use your reaction to reduce that creature's movement speed by 10 feet until the end of that creature's next turn. You may use this feature a number of times equal to your proficiency bonus, after which you must finish a long rest before you can use it again.
  
  
• You have resistance to cold damage.
  
  
• You have disadvantage on constitution saving throws when in warm environments.