race features:
Holmgang: +1 damage on each attack the half-giant chooses in bonus action. You can spend your reaction to run equal to your movement speed after the target.
Large body: +1 HP for each level. Also you can reroll ones on hitdice during level up and while healing using hit dices.
Cold Resistance: You have resistance to cold damage and ignore Extreme Weather Condition. You can ignore difficult terrain in snow.
Heat sensitivity: You have disadvantage on saving throws against Extreme Heat Weather condition.
Growing in Strength: For each 5 levels you gain additional +1 Strength and +1 Constitution.