You are a Fey

Your size is either small, medium, or large.

Your walking speed is 40ft

Your large fluff gives you extra resistance to the cold

Due to your alpaca legs, you are able to carry heavy objects as if you were large, no matter what size you are.

As a reaction, whenever someone misses a melee attack on you, you can deal a specified amount of damage against them. You can do this 3 times between long rests

Due to your fluffiness, you regularly build up a large amount of static electricity throughout the day. When a creature within 30ft of you hits you with a melee attack, you may use your reaction to force that creature to make a Dexterity Saving Throw. The DC for this saving throw equals 8 + your Constitution modifier + your proficiency bonus. On a failed save, the creature takes 2d6 lighting damage. On a successful save, it takes half as much damage. The damage increases by 1d6 when you reach 5th level (3d6), 11th level (4d6), and 17th level (5d6). 

You can release your static energy a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.