Watch Online Free on Watchseries. The first new animation in the classic Masters of the Universe style since 1985, The Curse of the Three Terrors picks up where the classic series left off inviting viewers to an all new Masters of the Universe Adventure. In this animation, Skeletor’s quest to destroy He-Man takes him to the Canyon of Spiders in the Dark Hemisphere, where he will encounter an unlikely enemy. Will Skeletor’s accidental discovery lead to the downfall of Eternia? Only you will be able to find out in this brand new animated show!