You've spent time exploring in bitterly cold climates, such as the Polar Territory or high in the mountains. The effects of Extreme Cold on you are reduced by one level.
At Level 12, you gain a permanent Resistance 1 to Freezing damage, and you have advantage on saves against Cryomancy spells.
At Level 22, your experience traversing thick snow allows you to move more quickly. You aren't affected by hazardous terrain or slippery ground. Your Freezing damage resistance increases to level 2.