History ComicBook / TheSupergirlSaga

* GreenRocks: Superman made use of the two specific isotopes of Kryptonite against the Phantom Zone criminals -- the Gold Kryptonite to strip them of their powers, and the Green Kryptonite to kill them.

* TimeTravel: Pocket Universe Lex Luthor transported Supergirl several centuries into the past of the mainstream DC Universe's Earth, believing that its Superman had the ability to time-travel by himself and could find her within that time period. However, because such was not the case with the mainstream DC Universe Superman, Supergirl remained buried in the Antarctic until scientists came and discovered her and revived her in the present day.

* LaserGuidedAmnesia: When transporting Supergirl from the Pocket Universe to the mainstream DC Universe, Lex Luthor blanked her memory so that she would not reveal anything to the Phantom Zone criminals if she got captured, but he also planted in her mind a compulsion to go to the Metropolis of that universe so that her memories could slowly return.

* TimeTravel: Pocket Universe Lex Luthor transported Supergirl several centuries into the past of the mainstream DC Universe's Earth, believing that its Superman had the ability to time-travel by himself and could find her within that time period. However, because such was not the case with the mainstream DC Universe Superman, Supergirl remained buried in the Antarctic until scientists came and discovered her and revived her in the present day.

''The Supergirl Saga'' is a three-part StoryArc that took place in the ''Franchise/{{Superman}}'' comic book titles in 1988. It was written by John Byrne, with artwork by John Byrne and Jerry Ordway. It was written as an introduction to the first ComicBook/PostCrisis version of ComicBook/{{Supergirl}} known as "Matrix".

* TakingYouWithMe: Quex-Ul strangles General Zod as they both die together by Green Kryptonite radiation.

* AtmosphereAbuse: The Phantom Zone criminals destroyed the Earth's atmosphere by destabilizing the planet's core, causing hot gases to erupt, stripping the planet to a lifeless husk. A Class 6 on the ApocalypseHow scale.

* AtmosphereAbuse: The Phantom Zone criminals destroyed the Earth's atmosphere by destabilizing the planet's core, causing hot gases to erupt, stripping the planet to a lifeless husk.

''The Supergirl Saga'' is a three-part StoryArc that took place in the ''Franchise/{{Superman}}'' comic book titles in 1988. It was written by John Byrne, with artwork by John Byrne and Jerry Ordway. It was written as an introduction to the first PostCrisis version of ComicBook/{{Supergirl}} known as "Matrix".

* ShapeshifterDefaultForm: Supergirl's default form in this story was that of Lana Lang, who, as it turned out, was killed by the Phantom Zone criminals and was thus recreated with her memories via Lex's artificial lifeform. Up to the point where she revealed herself to Superman in the story appearances leading up to this arc, Supergirl had blond hair.

* SealedEvilInACan: The Phantom Zone criminals that Lex Luthor accidentally let loose from their prison. The minute they escaped, they destroyed the Phantom Zone projector as well as anything else in Superboy's lab that could be used against them.

In the story, Superman encounters a young female wearing a variation of his outfit that calls herself Supergirl, claiming that she came from Lex Luthor. A brief fight occurs due to a misunderstanding between the two, but after Superman and Supergirl straighten things out, she reveals that she came from the Pocket Universe that Superboy of the Legion of Superheroes had come from. With the both of them now transported into that universe, Superman learns from its Lex Luthor the history of its Earth since Superboy had departed: that Lex had accidentally let loose the Phantom Zone criminals that have terrorized and devastated the entire planet, leaving only those who are within Lex's Smallville citadel its only survivors. The Phantom Zone criminals eventually killed the last surviving people of that Earth and reduced Supergirl to a protoplasmic puddle, where it is revealed that she was actually an artificial lifeform created by Lex Luthor to replace the deceased Lana Lang. Realizing that he was the only superhero left in the Pocket Universe, Superman rounded up the Phantom Zone criminals, stripped them of their powers, and subjected them to lethal radiation from that world's Green Kryptonite.

* ForWantOfANail: In the Pocket Universe, Lex Luthor came to Smallville after Superboy had left, thus avoiding the situation of his Silver Age counterpart becoming a criminal. Also Bruce Wayne, Hal Jordan, and Oliver Queen in this universe never adopted any superhero identities, though they serve as part of Lex Luthor's LaResistance team.

* GreenRocks: Superman made use of the two specific isotopes of Kryptonite agains the Phantom Zone criminals -- the Gold Kryptonite to strip them of their powers, and the Green Kryptonite to kill them.