Ability:

Possess superhuman intelligence

Limitations:

- Brain capacity may limit the user to a certain level of intelligence
- May become apathetic from those not on the same intellectual level as the user
- May grow to become psychologically insane
- May grow to become arrogant & egotistical

Users:

- Egghead (DC Comics)
- Mr. Terrific (DC Comics)
- The Riddler (DC Comics)
- Lex Luthor (DC Comics)
- Beast (Marvel Comics)
- Bruce Banner (Marvel Comics)
- Curt Connors (Marvel Comics)
- Spider-Man (Marvel Comics)
- Iron Man (Marvel Comics)
- Dr. Doom (Marvel Comics)
- Mr. Fantastic (Marvel Comics)
- The Leader (Marvel Comics)
- Charles Xavier (Marvel Comics)
- The Vision (Marvel Comics)