For the first time in series history, Activision is adding two brand new elements at the same time for Portal Masters to use in Skylanders: Trap Team.

Activision has announced that it will be adding the Knight Mare and Knight Light Trap Masters this holiday season for the special Light and Dark Element expansion packs of Skylanders: Trap Team. Both of these new expansion packs will include a new Trap Master and a special Trap that can capture Light/Dark villains. Also, you'll be able to trap a special location piece, which will get you into a special stage. While you're at this new level, make sure you keep an eye out for the expansion's villains making their debut, such as Nightshade and Luminous.

"It's amazing to see how deeply engrossed and fascinated our fans have been with the lore of the Skylanders franchise," said John Coyne, vice president of Consumer Marketing at Activision Publishing, Inc. "By unveiling new Light and Dark elements and heroes to the Skylanders universe, our fans around the world will have new ways of exploring all the magic, excitement and fun of Skylands."

Skylanders: Trap Team's Dark and Light Element expansion packs will be available at most places where Skylands toys are sold for the price of $29.99. They'll be hitting Toys R Us store shelves first on Dec. 21.