Champions Online players will get a helping hand from Witchcraft through New YearÂs Eve with a Double XP event. Witchcraft will make her return this week to help heroes out with a Double XP boost buff. Champions Online players can speak with Witchcraft near Defender in Renaissance Center to get the four hour Bonus XP buff. If it runs out, you can speak with Witchcraft again to get a new one until she departs the area around December 31st.
Source: Champions Online website