He-Man Power Sword; Skeletor had the second half, and used it as his main weapon. When joined, the two halves of the Power Sword will provide the key to Castle Grayskull (this is why the two figures' swords could combine into one, when the action figures were initially released). In one early illustrated story, He-Man and Skeletor united their two Power Sword halves to form the true Power Sword, defeating a common enemy. In June 2012, DC Comics began publishing a six-issue limited series, "He-Man and the Masters of the Universe", alongside the weekly digital first series "Masters of the Universe".
He-Man/ThunderCats friends and He-Man and Lion-O rush into the Castle. He-Man guides Lion-O through the maze of Castle Grayskull saying it is a nexus of worlds and reality through space and time and they must find the Sorceress before it's too late. They arrive at a shattered door that shocks He-Man as he says no intruder has ever gotten so far into the Castle. Both heroes charge forward and find the newly formed Mummator imprisoning the Sorceress and holding an orb that is the heart of the Castle, the key to all the power that Greyskull possess. Mummator says that he