* BigLippedAlligatorMoment: ComicBook/{{Dazzler}}'s introduction during the first third of the arc feels jarringly out-of-place. She made up for it in later appearances, but in the context of this story she's very much this.
** It's even jarringly out-of-place ''for 1980 altogether'' -- Dazzler had been the product of a failed attempt at cross-promotion with Casablanca Records back in 1977, when Marvel and the record label were going to have a superheroine with both a comic book and a disco LP. This would have made sense in '77, when disco was still a big thing. However, by 1980, when Dazzler finally appeared, disco was, well, DeaderThanDisco. For reasons known but unto the writing and editorial staff at the time, they decided not to change Dazzler's schtick at all. [[FromBadToWorse And then had her, disco-ball necklace, roller-skates, glitter and spandex leotards included, performing at a punk venue.]] [[WretchedHive A punk venue that would have made the real-world Los Angeles late-'70s punk hangout the Masque look like Disney Hall in comparison.]] Much {{Narm}} has been had from this...
* [[SugarWiki/AwesomeMoments Crowning Moment Of Awesome]]: The story itself is arguably one for Claremont, as it's the story that cemented him as [[MyRealDaddy the greatest X-Men writer of all time.]]
** Creator/JohnByrne's artistic contributions can't be discounted either. His art was at turns [[SceneryPorn incredibly complex]] and [[TearJerker deeply evocative]]; the book is still held up as a standard for superhero comics today thanks to their collaboration.
* EnsembleDarkhorse: Even though Jean's "Black Queen" persona was quickly ditched after this story ended, her [[EvilCostumeSwitch Black Queen costume]] is hugely popular in fan art circles. [[EvilIsSexy I wonder why...]]
* EvilIsSexy: The White Queen. The Black Queen. Dark Phoenix herself, for some. And for Jean in-story, Jason Wyngarde.
* ItWasHisSled: Jean Grey's death in this is ''infamous,'' though even the creators themselves didn't know how it would turn out until they wrote it.
** Even more so, at one point, the mysterious Jason Wyngarde, the man who was slowly and carefully setting up the MoreThanMindControl that he hoped would bring the Phoenix under his control, is dramatically revealed as none other than old-school enemy Mastermind. At the time, Mastermind had only been seen as a recurring RoguesGallery member back ''before'' the end of the original 1960s run, and we never saw any hint of his outside life, let alone gotten a civilian name. By now, both names have been used for him for so long that for anyone who ''didn't'' begin with the original sixties run and read in order, the revelation comes off as being told that - spoiler alert! - that "Clark Kent" guy is in fact {{Superman}}.
* MoralEventHorizon: To Editor-in-Chief JimShooter, Dark Phoenix destroying an inhabited star system counts as this.
* NeverLiveItDown: Jean's death in this (and resurrection in a later tale) made her the TropeNamer (it was originally called "Jean Grey Escalation") before people started proving the point (by [[CompletelyMissingThePoint completely missing it]]), confusing the trope with either DeathIsCheap or WithGreatPowerComesGreatInsanity.
** This story became the standard against which all X-Men arcs are judged, and has been retold and revisited in almost every media. Sometimes, it's the only reason a creative team will even put Jean Grey in an X-Men story to begin with. It's been a good decade since the last screen adaptation to not treat it like the only story she was ever in.