Mark of the Frostmaiden

You gain the following benefits:

• You gain resistance to cold damage. 
• You learn the Rime’s Binding Ice spell, which you may cast once per long rest without expending a spell slot. Wisdom is your Spellcasting modifier for this spell. 
• You may change a spell’s damage type to cold damage a number of times equal to your proficiency bonus, and you regain all expended uses on a long rest.