Little Giant. You have proficiency in the Athletics skill, and you count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.

Titan's Endurance. You can supernaturally draw on the might of your Giant ancestors to shrug off harm. When you take damage, you can use your reaction to roll a d12. Add your Constitution modifier to the number rolled and reduce the damage by that total. You can use this trait a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Heart of Ice. Your Frost Giant ancestors thrived in the frigid fringes of the world. You have resistance to cold damage.

Winter's Wrath. You gain an additional way to use your Titan's Endurance feature. When you make an attack roll and hit a creature or object, you can use your reaction to expend one use of Titan's Endurance to amplify the damage. When you do so, the target takes an additional d12 of damage of the same type as the original attack. If there is more than one damage type, you choose which one is increased.