After years of fighting, Skeletor has been beaten back and the Mystic Wall has been sealed again to protect Eternos. Man-At-Arms suggests an Eterniathlon (similar to the Olympics) to keep the warriors fighting prowess at peak. Skeletor, however, had again unsealed the wall, and was simply waiting for the right opportunity to strike again. It turns out that that time was during a competition. When the warriors defeat the monsters he had thrown at them, Skeletor takes off in the Roton towards Grayskull, where the heroes come to find that he has taken it over. Luckily, they easily defeat him, and, in the end, Skeletor, Evi-Lyn, and Beast Man fall through the Lost Corridors of Time and end up on a desolate planet. The heroes take this opportunity to celebrate, knowing that they have once again beaten back Skeletor's forces.