Supergirl 1994 or Supergirl (Volume 3) was a four-issue limited series published in 1994. It is the only Supergirl series to feature the Matrix Supergirl.
After the death of the original Supergirl in Crisis on Infinite Earths, DC needed to come up with a new Supergirl-named character in order to not lose the trademark. So, John Byrne — in The Supergirl Saga Story Arc — created "Matrix", a shape-shifting protoplasmic purple creature imprinted with Lana Lang's memories who hailed from a Pocket Dimension that was destroyed by Phantom Zone criminals and who just so happened to take the form of a female Superman.
After her creation, Matrix turned into a child-like, featureless blob, went crazy several times, roamed the galaxy, became Brainiac's slave and later Lex Luthor's lover/unwitting puppet. This mini-series resolves that long subplot revolving around her relationship with Lex.
Supergirl 1994 provides examples of:
- Bat Family Crossover: This series intersects with the beginning of The Battle for Metropolis near its end, when Superman stops Matrix from murdering Lex.
- Break the Cutie: Matrix doesn't take it well after learning that everything she thought she knew about Luthor was all a lie. Lampshaded with the title of Chapter 3, "Innocence Lost."
- Evil Redhead: Lex Luthor is a red-haired, evil, Manipulative Bastard. And a creepy pervert.
- One-Man Army: Matrix easily tears Lex's troops apart.
- Spikes of Villainy: When Matrix goes crazy she shifts her costume into something sleeveless with spiked bands around her arms.
- Telekinesis: Her invulnerability is in fact a telekinetic invisible shield.
- Unstoppable Rage: She flies off the handle when she discovers that Luthor had made thousands of clones of her from the residue he collected after her fight with Doomsday. She was very close to killing him too.
- Unwitting Pawn: She was this to Lex until she found out about the clones and realized he was evil.
- What Measure Is a Non-Human?: Luthor refuses to treat or consider Matrix as a human being.