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Associated with
Heroes:Io minimap icon.png Io
Chaos Knight minimap icon.png Chaos Knight
Keeper of the Light minimap icon.png Keeper of the Light
Enigma minimap icon.png Enigma
Places:Fundamental Plane

Fundamentals are powerful primordial entities, each representing a facet of the universe. They exist beyond the limits of the physical plane, and possess abilities that defy the laws of nature.[1] Elder Titan minimap icon.png Elder Titan created the Fundamentals during the Schism, when he divided the forces of the universe.[2][3] When a Fundamental dies, it returns to the Fundamental Plane.[4]

List of Fundamentals[edit]

There are four Fundamentals, meaning that some mentions to Fundamentals must be overlapping references to the same entity.[5]

  • Io minimap icon.png Io: The Fundamental of the negative and positive charges that bind all matter together. Io exists on all planes at once, with only a fraction of its being crossing into physical existence at any one moment. The most mysterious of all Fundamentals, Io predates time itself and acts as a benevolent force that twists the attractive and repulsive charges of the universe to aid its allies.[1]
  • Chaos Knight minimap icon.png Chaos Knight: The Fundamental of Dark, the oldest and most tireless. He is a physical manifestation of chaos. He can shift from plane to plane to extinguish the Light or call upon other versions of himself from other planes.[1][6]
  • Keeper of the Light minimap icon.png Keeper of the Light: The Fundamental of Light, the creator of ancient suns.[7][8] He was the first to depart from the "progenitor realm", and is considered a rogue by Chaos Knight.[9]
  • Enigma minimap icon.png Enigma: The Fundamental of Gravity.[1][10]


  • The Fundamentals were originally known as the Five Founders, likely with Elder Titan minimap icon.png Elder Titan making up the fifth member.[11]


  1. 1.0 1.1 1.2 1.3 Io biography.
  2. Elder Titan response: ▶️ Child of the Schism, Io returns to Unity.
  3. Elder Titan response: ▶️ That which I divided, returns to Unity.
  4. Elder Titan response: ▶️ Return to the Fundamental plane.
  5. Astral Spirit description.
  6. Chaos Knight biography.
  7. Elder Titan response: ▶️ So dies the spark of ancient suns.
  8. Phoenix biography.
  9. Chaos Knight biography.
  10. Bristleback response: ▶️ I expected more from a Fundamental.
  11. Elder Titan response: ▶️ The Five Founders, united again.