Project Good has released a set of Christmas Powers for use with their Project: Good rules.
From their announcement:
You can now download some festive powers for your games of Good: the Battle, as well as Christmassy miniature bonuses. The only stipulation is that you can only use these powers in a decorated room, and during December. Merry Christmas.
Festive Downloads, and more available from the Rules & Errata Section of www.projectgood.co.uk