Skeletor (/ˈskɛlᵻtɔːr/) is a fictional character and the primary antagonist of the Masters of the Universe franchise created by Mattel. He is the archenemy of He-Man. Depicted as a muscular blue humanoid with a purple hood over his yellowing bare-bone skull, Skeletor seeks to conquer Castle Grayskull so he can obtain its ancient secrets, which would make him unstoppable and enable him to conquer and rule Eternia but his incompetent henchmen's stupidity always gets in the way.
In the 2002 series, Skeletor was once a man named Keldor whose face accidentally got splashed with a corrosive liquid. He survived, but at the cost of his face.
The first minicomics that accompanied the 1981–1983 line of Masters of the Universe toys presented the earliest version of continuity, and showed many differences from the more widely known continuity of the later cartoon made by Filmation, and the later minicomics which complemented it. He-Man was depicted as the scarcely superhuman champion of a tribe of stone-age jungle-dwellers. There was no royal court of Eternia, King Randor, Queen Marlena, or Prince Adam yet.
Taskmaster (Tony Masters) is a fictional character appearing in American comic books published by Marvel Comics. The character was initially depicted as a supervillain but now is often portrayed as an antihero. Taskmaster first appeared in Avengers vol. 1 #195 (May 1980) and was created by David Michelinie and George Pérez. Introduced as an enemy of the Avengers, Taskmaster went on to feature in numerous Marvel titles, most notably as an enemy/ally of Deadpool. He is often hired as a training instructor by various criminal organizations, as well as S.H.I.E.L.D. and the U.S. government. In Taskmaster vol. 2 #3 (2011), the character was revealed to be a sleeper agent of S.H.I.E.L.D. planted by Nick Fury to gather intelligence in the criminal underworld.
The Taskmaster first appeared briefly in Avengers #195 (May 1980), before making his full debut in Avengers #196 (June 1980). The character went onto appear as a supervillain and a villainous training instructor in Marvel Team-Up #103 (1981), Avengers vol. 1 #223 (1982), Marvel Team-Up #146 (1984), The Thing #26 (1985), Iron Man vol. 1 #254 (1990), Captain America vol. 1 #334, (1987), #394 (1991), #396 (1992), #403 (1992), Captain America Annual #11 (1992), The Amazing Spider-Man #366–367 (1992), Daredevil #292–293 (1991) and #317–318 (1993), Sensational She-Hulk vol. 1 #59 (1994), Elektra #5, #7 (1997), Hawkeye: Earth’s Mightiest Marksman #1 (1998), Avengers vol. 3 #26 (2000), #38 (2001), Captain America vol. 3 #44 (2001), Moon Knight vol. 3 #3–6 (2006), Spider-Woman: Origin #2–3 (2006), Civil War #3, #5–7 (2006–2007), Marvel Comics Presents vol. 2 #1–2 (2007), Siege: The Cabal #1 (2010), Siege #2–3 (2010), Captain America & Crossbones #1 (2011), Avengers Academy #9 (2011) and Daken: Dark Wolverine #12 (2011).