Activision has announced the first ever expansion for its Skylanders series as Skylanders Trap Team will introduce two new elements: Light and Dark.

Two new Trap Masters will be made available at retail this holiday season via special Dark and Light Element Expansion Packs: Knight Mare and Knight Light. The expansion will include new adventures that will add to the Trap Team lore as players will receive a new Trap Master, a special Trap that’s capable of capturing either Light or Dark villains, and a location piece that unlocks a special level in-game.

The new Light and Dark elements will reveal an additional backstory to the Skylanders universe that tells the tale of both Knight Light and Knight Mare being protectors of Skylands, that is, until they were sealed off into other realms. They now join the Trap Masters as Knight Light dons his Traptanium Blade and Knight Mare wields her Traptanium Lance.

The Light and Dark Element Expansion Packs will retail for $29.99 starting on Sunday, December 21.