Nightmare Fuel / Iron Man: Armored Adventures
  • Rhona during "All the Best People Are Mad", tried to gas Whitney, cut Rhodey in half, vaporize Pepper and electrocute Happy.
    • And she did something similar once before, so she probably has quite the bodycount behind her.
  • Mallen in "Extremis", once he takes the Extremis formula. The creepy cocoon he comes out of, his black eyes with red irises, his decomposed skin, the growing insanity, not to mention his enhanced strength, super-speed, and lightning and heat powers, make him one of Iron Man's most terrifying foes.
    • There's also the sheer insanity in his actions.
  • Pretty much everything about Technovore.
  • MODOC from "Designed Only for Chaos" itself is pretty scary. It's a technologically advanced Humpty Dumpty that, to put it simply, Mind Rapes you and steals everything in your head.
    • You didn't misread that, people. This show actually manages to make MODOC legitimately threatening.
    • Also, this version of MODOC looks just plain creepy. It's especially unsettling because because this was never a problem with MODOC.
  • Justin's beginning as Titanium Man in "Titanium vs. Iron", has him brutally blow up Iron Man's empty armor, and actually express disappointment there are no blood splattering everywhere.
  • Justin Hammer's zombie gas in "The Hammer Falls" and its effects. Also, Justin's Villainous Breakdown may qualify. He deserves it, but God is his Sanity Slippage creepy.
    • In "The Hammer Falls", Iron Man drops Justin Hammer from high up into the air, into his building. He makes no move to catch him, proving that he wasn't simply trying a scare tactic; if Hammer didn't grab onto something, he genuinely might have died. Afterwards, Mr. Fix took the remote that Hammer tried to use, shoved Hammer into a pod previously used on Killer Shrike, and zombified him. Iron Man then shot the computer that Mr. Fix was inhabiting. Earlier in the series, Mr. Fix was removed from his body and transformed into an AI, being trapped inside of a computer. The same computer that Iron Man just destroyed. In other words, Tony pretty much killed Mr. Fix.
  • The extra-dimensional demon Dr. Doom summoned in his second appearance.
  • Magneto gets some credit for being able to find "Annie" in "The X-Factor", no matter where she runs, claiming that he can sense the iron in her blood like a fingerprint. All in Creepy Monotone.
  • Watching the Makluan Overlord's son being vaporized near the end of "Dragonseed".