This gives you the Reindeer Rank in game & the Reindeer Hat. You can see an image of the Reindeer Hat by viewing the image below, equip it in game by using /cosmetics and clicking the Reindeer Hat! The Reindeer Rank grants a Yellow -> Red chat gradient in game when equipped. 

You can equip your rank in game by doing /ranks, clicking Cosmetic Ranks and scrolling over to the Reindeer Rank. You CANNOT equip two ranks at once. If there's any issues, feel free to open a Ticket on our Discord describing the issue.