Your Dexterity or Charisma scores increase by 2, and your Intelligence or Wisdom increase by 1. 

Christmas Elves reach maturity before age 40, and tend to live more than six centuries.

Christmas Elves tend towards alignments to law and goodness, but the Naughty List did come from somewhere. 

Christmas Elves average around 3 feet and 50 pounds. Your size is Small. 

Your base walking speed is 25 feet.

You gain proficiency in the insight and investigation skills, and Tinker’s tools.

Your sense of Christmas Spirit allows you to withstand hardship and the harsh winters. When you are reduced to 0 hit points but not killed outright, you can drop to 1 hit point instead. You can’t use this feature again until you finish a long rest. You also gain resistance to Cold damage. 

You can speak, read, and write Common and Elvish.