The circumstance of gaining power, skills and enhancements from a past experience.


Circumstance grants the user extraordinary abilities by either scientific or supernatural experimentation, accidents, medical treatment, etc. The effects of the event may grant superpowers to the user if they survive, or sometimes even if they don’t. Powers granted to the user by the event may be scientifically inclined if anthropogenic or supernatural if otherwise. Depending on the event in question, powers might be a gift, a curse, or both.




  • User may develop Aversion.
  • User has limited to absolutely no control over the outcome of their catalyst event.
  • User may often obtain an undesired power.
  • Disfigurement is common.
  • Regulation or even Dependency may be an issue if catalyst event destabilizes the user in some way.
  • Event might cause use user to go insane.
  • User may require certain objects to utilize their powers.

Known Users


  • Spider-Man (Marvel Comics); radioactive spider bite.
  • The Flash (DC Comics); Lightning and chemicals
  • The Lizard (Marvel Comics); experimentation.
  • Poison Ivy (DC Comics); experimentation.
  • Hulk (Marvel Comics); exposure to gamma radiation.
  • She-Hulk (Marvel Comics); blood transfusion.
  • Captain America (Marvel Comics); super soldier serum.
  • Isaiah Bradley (Marvel Comics); super soldier serum.
  • Elijah Bradley/Patriot (Marvel Comics); blood transfusion.
  • Melati Kusuma/Komodo (Marvel Comics); Lizard serum
  • Fantastic Four (Marvel Comics); bombardment by cosmic rays.
  • Solomon Grundy (DC Comics); supernatural reanimation.
  • V (V for Vendetta - Vertigo/DC Comics); experimentation and torture as part of a bioweapons program.
  • Deadpool (Marvel Comics); experimentation.
  • Daredevil (Marvel Comics); blinded by radioactive waste.


  • Clayface (Batman: TAS); assassination attempt.
  • Static (Static Shock); exposed to chemicals.
  • Bang Babies (Static Shock); exposed to chemicals.


  • Adaline Bowman (The Age of Adaline); car crash into a river coupled with a strike of lightning.

Known Objects

  • Mutagen (Teenage Mutant Ninja Turtles)
  • Chemical X (The Powerpuff Girls)
  • Power Rings of Inspiron (Super Buddies)