Frost Brand
Legendary bracelet
1/Safe rest: you can lower the temperature in reach 20 (100 feet) by 20 degrees C for 10 minutes. All non-magical flames are extinguished. While in this area your hand becomes an icy claw which deals 1d6+10 cold damage.
For example, if you were sat in a chilly room at 10 C you could turn it into -10 C and be even colder. Lucky you!