The eighteenth card is a Christmas tree topper, Hoshiningen. It is a monster that boosts light monsters by 500 attack and weakens dark monsters by 400 attack, it has 1000 attack as long as its effect is active. It could be fairly useful in fairy decks, especially since it is a fairy as well. If you can keep it alive it could be moderately useful, especially if your opponent uses dark monsters, probably only kept in the side deck. There are actually similar monsters for all six of the main attributes, and they all have upgraded link versions, this ones being Hip Hoshiningen. Either way, thank you Hill and Knowlton Strategies and Konami for the Advent Calendar.