He-Man/ThunderCats could destroy them both. He-Man fires his power into the Sword of Omens as together he and Lion-O summon the Power Beyond Power at Mummator. The resulting blast of energy overwhelms Mummator and blasts him apart into Skeletor and Mumm-Ra before disintegrating both beings. The resulting blast transforms He-Man back into Adam but seals the orb and both the Sorceress and Jaga claim victory for the heroes. Lion-O looks and sees a portal back to Thundara and is desperate to return and save his father and his world saying he won’t run away again. Adam gently holds his friend back
He-Man be a descendant of King Grayskull (a powerful barbarian and a hero from Eternia's ancient past), who sacrificed his life in order to save Eternia from the Evil Horde and originally wielded the Sword of Power. He was the original owner of Castle Grayskull; his sword was concealed in the castle for centuries before being given to Prince Adam, who inherited his ancestor's own power channeled through the sword (thus giving added meaning to the phrase "By the power of Grayskull..."). This action-figure line combined elements from the He-Man universe into a cohesive storyline with biographies on the figures' packaging.