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It looks like 343 Industries is bringing back the popular Halo 3 map, Valhalla. Halo 4's version of the massive map is called Ragnarok and, aside from its usual cliffs and cannons, will now feature the new Mantis mech. In the above video, you can see the Mantis stomping on Ghosts and unleashing general carnage with the requisite dubstep backing.
