(Helbranni) Stoneblood Endurance

Prerequisite: Helbranni upbringing or DM approval
You were shaped by wind, cold, stone, and thin mountain air.
Benefits
• Increase your Constitution or Wisdom by 1, to a maximum of 20.
• You have advantage on saving throws against exhaustion caused by environmental hardship, forced marching, climbing, or extreme cold.
• You reduce cold damage you take by an amount equal to your Proficiency Bonus.
• You require half as much food and water during overland travel in cold or mountainous environments.