He-Man/ThunderCats all sides, He-Man defeats them all with help from Randor. Back in Skeletor's lair at Snake Mountain he explains to Mumm-Ra that he could never wield the Power of Grayskull without it consuming him. But by mixing Mumm-Ra's ashes to a potion it will link Mumm-Ra's ever living power to him allowing him to use the Power Sword. Despite Mumm-Ra's protests Skeletor drinks the potion and summons the Power of Grayskull to him adding He-Man's strength to his own. He-Man suddenly is transformed back into Prince Adam in front of Randor who is horrified as his son collapses in his
He-Man/ThunderCats has won and only needs He-Man's Sword of Power to unlock the orb and gain the power to control reality throughout the Multiverse. He-Man and Lion-O attack but realize that they need to get the orb and the Sword away from Mummator. Lion-O says that since the Castle is a nexus of realities they can use it to get Mummator away from the orb. Together the heroes push Mummator off an edge and the three plunge downward only to land in an Eternia that is controlled by Mummator. Taking advantage of Mummator's confusion He-Man gets the orb and he and