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''Blue Devil'', a comic which debuted in 1984, told the tale of Dan Cassidy, a stuntman and SpecialEffects expert who was part of the crew for a monster movie. He created an amazing, full-body prosthetic devil suit chock full of PracticalEffects, and, since this was the Franchise/DCUniverse, a strength-enhancing exoskeleton, as well.

That's right: he created functional, battle-ready PoweredArmor, wrapped it in latex and animatronics, ''[[SuperPoweredRobotMeterMaids and used it as a movie prop]]''.

Naturally, it got worse.

The movie was being filmed on location, in a Lost {{Mayincatec}} TempleOfDoom, and the hapless Hollywoodlanders awoke the SealedEvilInACan: a demon named Nebiros.

Dan, of course, decided to fight off the demon in his [[SuperPoweredRobotMeterMaids souped-up rubber costume]], and managed to drive it back into the aforementioned Can, and re-seal it. In the fight, alas, he took a full-on blast from the demon's EyeBeams -- and when the dust cleared, he realized that he could no longer take the suit off. [[BlessedWIthSuck It was]] [[TwoBeingsOneBody fused to him.]]

Because of this [[{{Magitek}} weird fusion of magic and technology]], Dan became a WeirdnessMagnet -- in fact, this is the TropeNamer. His comic was a funny, fun-filled romp through the superhero universe, with tongue-in-cheek side trips into the territory later staked out by Vertigo. Dan even joined the Franchise/{{Justice League|OfAmerica}}, during the soap operatic and angst-heavy Gerard Jones run.

Needless to say, TheNineties were [[MediaNotes/TheDarkAgeOfComicBooks not kind to him]]. He made an (involuntary) [[DealWithTheDevil deal with a devil]] for increased power, and now really ''is'' a devil.

Since then he's become a member of a team title, ''ComicBook/{{Shadowpact}}'', which has a team of magical troubleshooters including other "esoteric" DC heroes, which include Detective Chimp and Phantom Stranger, and has even joined the ComicBook/JusticeSocietyOfAmerica. His sidekick, Kid Devil, suffered a similar fate (and later joined the Comicbook/TeenTitans).

In the ''ComicBook/{{New 52}}'', Blue Devil co-stars with ComicBook/BlackLightning in a few issues of the AnthologyComic, ''DC Universe Presents''. In the ''New 52'', Dan Cassidy is once again a man in a blue skinned devil suit. However, the suit is now completely magical, as it is actually made from the skin of the demon Nebiros. The suit was given to him by his grandfather.

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!!Tropes:

* ArchEnemy: The demon Nebiros, until he was killed in ''Day of Judgment''.
* BackFromTheDead: After he becomes a proper demon, death becomes a temporary thing for him.
* BecomingTheMask: A very literal case. After he sacrifices his life to stop Neron's plans, he comes back to life as an actual, factual demon. As a lifelong Catholic, Dan is less than pleased.
* TheBigGuy: In ''ComicBook/{{Shadowpact}}''.
* BlessedWithSuck: Not least because he's a devout Roman Catholic who, because of his DealWithTheDevil, can never again enter a church.
* CameBackStrong: Seemingly dies during ''Underworld Unleashed'', but comes back as a full-fledged demon.
* CivvieSpandex: He has ditched his old costume for a black T-shirt and jeans since the 2000s.
* DarkIsNotEvil: He's (technically) a devil, but also a good guy.
* DealWithTheDevil: During ''Underworld Unleashed'', Dan made a deal with Neron--he could be a movie star, and all he had to do was destroy an abandoned power station in the middle of nowhere. Unfortunately, thanks to the lights it powered not being on, Dan's producer/agent/close friend Marla Bloom was killed in a helicopter crash. Calls and offers from sympathetic Hollywood folks began pouring in, but understandably he was [[HeroicBSOD in no mood]] to answer.
* DevilsPitchfork: Blue Devil wields a trident, initially a technological one linked to the costume, then aquires Lucifer's own during ''Comicbook/UnderworldUnleashed''.
* EgocentricTeamNaming: ''Annual #1'' had several supernatural-themed characters team up. At the end, the Creeper suggests that this "spooky Justice League of America" be a regular team called "The Creeper's Spirit Squad". Which everyone thinks is "[[ComicBook/JusticeLeagueDark the]] '''[[ComicBook/JusticeLeagueDark stupidest]]''' [[ComicBook/JusticeLeagueDark idea I've ever heard!]]".
* FourFingeredHands: His costume in the ''New 52'' has four fingers, but Dan can easily put his five fingers in them. Justified as the costume is magical.
* [[GenuineHumanHide Genuine Devil Hide]]: His costume in the ''New 52''. Dan thinks it's just a high tech suit until Black Lightning points out the wires inside are really veins. It's made from the demon Nebiros's skin, and the guy really wants it back.
* HolyBurnsEvil: The Mist II temporarily kills him at one point by replacing the water in the sprinklers of the building he's in with holy water.
* InappropriateRoleModel: When confronted by Zauriel, he learns that as a demon and a superhero, BD's inadvertently making Hell look awesome and setting an example for weak people to sell their souls so they can be like him. This spurs him to try and get out of his infernal contract.
* KidSidekick: [[IJustWantToBeSpecial Eddie Bloomberg]] (Marla Bloom's nephew) was temporarily Blue's, though he later became Kid Devil/Red Devil and joined up with the Comicbook/TeenTitans during One Year Later.
* MagicFromTechnology: The suit before he was fused with it.
* {{Magitek}}: His original costume.
* MyGodWhatHaveIDone: After Marla's death. Particularly when his sometime sidekick Kid/Red Devil ''also'' made a deal with Neron to get powers, with the condition that if he ever lost his faith in Dan, Neron would get his soul. One confession later...
* RhymesOnADime: At one point, he's demoted to a Rhyming Demon.
* WeirdnessMagnet: The TropeNamer.
* WholeCostumeReference: Blue Devil's ''New 52'' costume looks extremely similar to an unused design for Kid Devil drawn when he renamed himself Red Devil and got a new outfit.

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