He-Man clash with Skeletor, in which Skeletor was flung deep beneath Castle Grayskull into a pit filled with steaming liquid. The film ended with a post-credit scene in which Skeletor emerged from the liquid and proclaimed, "I'll be back!". After the end of the Masters of the Universe toy line, Mattel attempted to revive interest in He-Man by producing a new toy line, entitled "He-Man". The accompanying storyline in the mini-comics packaged with the figures explained that He-Man had left Eternia and pursued Skeletor into the depths of space, where Skeletor had set his sights on conquering the distant world of
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