Which DC Villains Have Fought Against 'Adeptus Custodes'?

I've been deep into Warhammer 40K and DC crossovers, and while 'Adeptus Custodes' are Warhammer's golden boys, some DC villains have clashed with them in fan theories and niche comics. Darkseid tops the list—his Omega Beams vs. Guardian Spears would be epic. His raw power and cosmic tyranny make him a natural foe. Then there's Black Adam, whose magical fury and near-invulnerability could stand against their auramite armor. The Joker’s chaos vs. their discipline is a wild card, though he’d likely get obliterated fast. Ra's al Ghul’s immortality and strategic mind might last longer, but even he’d struggle against their sheer martial perfection.

As someone who consumes both universes voraciously, the matchups between DC villains and 'Adeptus Custodes' are fascinating. The obvious candidates are the god-tier threats. Darkseid’s entire persona as a tyrannical deity clashes with the Custodians’ duty to protect the Emperor. His parademons would be shredded, but his personal might could challenge even their finest. Doomsday’s adaptive regeneration poses a unique problem—could they put him down permanently before he evolves past their weapons? Lobo’s brute strength and unkillable nature would make for a brutal, endless brawl.

Lesser-known villains like Circe or Felix Faust bring magic into play, which the Custodes aren’t typically equipped to handle. Circe’s transmutation spells could turn their armor into lead, while Faust’s demonic pacts might corrupt their purity. On the tech side, Brainiac’s cold logic and planet-sized resources could overwhelm their small numbers. The real wildcard? Reverse-Flash. His time manipulation could outpace their reflexes, though their precognitive training might level the field. These hypothetical battles highlight how DC’s roster tests even the Emperor’s finest.

Let’s talk about the weirdest matchups. Bane breaking a Custodian’s spine? Unlikely, but his tactical genius and venom-fueled rage might let him hold his own—briefly. Poison Ivy’s biomancy could turn their fortress worlds into jungles, forcing them to fight their own terrain. Killer Frost’s absolute zero attacks might crack auramite, given enough time. Scarecrow’s fear toxin is a fun thought experiment—would it affect beings trained to resist psychic horrors?

Then there’s the emotional angle. Harley Quinn’s unpredictability versus their rigid discipline is comedy gold. Deathstroke’s enhanced skills mirror theirs, making it a duel of equals. The real curveball? Mr. Mxyzptlk. His reality-warping renders their combat prowess moot, unless they trick him into saying his name backward. These clashes show how DC’s varied rogues’ gallery offers endless what-if scenarios against Warhammer’s elite.