I don't normally start a write-up of one of these collections by explaining exactly which parts get the 5-Stars but this is a special case, because this volume is simultaneously some of the most brain-melting, life-changing comics ever put out by Marvel and a complete fucking mess. There's a reason this collection - and all collections of the run - emphasise the Demon Bear Saga and I'm not reviewing, say, The Cloak And Dagger Odyssey or The Gladiators Epic. So, for the avoidance of doubt, the top-tier stuff here is:
New Mutants 18-21 - "The Demon Bear" and "Slumber Party"
The art in New Mutants 22-31 - the remaining Sienkiewicz issues
The cover of New Mutants Annual 1 - "Steal This Planet: A Rock Fable"
Every one of the 14 issues had plenty of potential to rewire readers' brains - my first ever New Mutants comic was the end of the run, Issue 31, an issue I found both completely incomprehensible and utterly compelling because the art screamed from the page at me in a way no other Marvel comic I'd read did. But at the time I read it I assumed that a lot of things in it would be clear to me if I'd just seen the previous issues, and it was years later I realised that no, this is not how Chris Claremont and the X-Books were operating at this point. Don't know who the green lady with the sword and the horse guy are? Join the club - they're plot strands from a Dazzler mini-series, in a story that's far more about Dazzler than about any of the New Mutants themselves.
That's typical of Claremont in this era - the X-Books are his fiefdom, and characters and ideas slip around between them. Sienkiewicz' first issue opens with an unbelievably hardcore sequence of a future Professor X being gunned down in his wheelchair, the force of impact blasting him right to left across a page spread. It's magnificent, and nothing else to do with anything in the book, because the plot in question - Rachel Summers' arrival in the present - jumps straight to X-Men. That's OK - lots of people were reading both - but Claremont also used his corner of the Marvel Universe to poke away at a bunch of other pet characters and plots, like the Gladiators and Cloak And Dagger, and towards the end of this volume finds his own spinning plates upset by the introduction of Secret Wars II: there's a very funny scene where Magneto drops in from the sky to basically halt the entire plot and say "sorry lads, it's crossover time", which is a nicely grumpy way of handling it but does kill the momentum of the story it interrupts.
Claremont is also continually broadening and complicating his central cast. This stretch of the comic introduces Lila Cheney (and Strong Guy!), Warlock, Cypher, and Legion, characters who mostly came into their own long after Claremont left the books. It does a bit of repair work on the extremely dodgy Charles Xavier/Gabrielle Haller relationship, with Charles at least acknowledging he badly crossed some lines. It gives that mutant/human relationship a parallel with an ongoing subplot involving Magneto being badly wounded and getting involved with Lee Forrester - I love Sienkiewicz' stubborn, gnarly, elderly-looking Magneto. So there's a ton of good, rich, stuff in these comics, but even for Claremont they're unusually loose, chaotic and unfocused.
Now, that's sort of fine, because if you're working with Bill Sienkiewicz in 1984, then giving him a lot of crazy stuff to draw whether it makes sense or not is a perfectly good strategy. And issue after issue he delivers. But the sad truth is Claremont's scripts only really rise to the collaboration at the beginning, on Demon Bear and particularly on issue #21's "Slumber Party", the introduction of Warlock and a basically perfect comic. But what makes those issues - and Sienkiewicz' work on the book in general - so special?
Sienkiewicz' is the first (perhaps only) New Mutants artist to bring out two things that are critical to the characters. First, obviously, they're kids, but they're kids who were created and being written at a time of radical ferment in youth culture with the advent of MTV, and Sienkiewicz makes New Mutants into a new wave comic - full of angular energy, weird mixes of the extremely pretty (he can draw lovely, expressive faces) and the ugly and awkward. It's a similar effect to what happened on the X-Men when Paul Smith took over and all the characters acquired staggeringly good hair - the book suddenly feels like a comic for and about the 80s. (Compare Bob McLeod's initial version of Lila Cheney with how she looks when Sienkiewicz draws her a few issues later, the difference between some squares' idea of a rock star and, well, a rock star).
The signature character for this side of Sienkiewicz' work on the book is Cannonball, who gets a ton of screen time and who the artist clearly loves drawing - not only is his flat-top a gift for such an angular penciller, Sam's the perfect combination of an awkward, undeniably young man but with a power set which lets Sienkiewicz break up and punkify any page, scoring it with those angry scars of red and orange from Sam's straight-line blasts.
And that's the other thing Sienkiewicz' gets about the New Mutants. Most of them are freaks and he draws the freaky hell out of that. Illyana's armour gets blurry and chromey; Sunspot's solar form a splatter of ink; Magma a swirl of uncontainable colours; Rahne's transitional form starts looking like a fur explosion; and obviously Warlock lets him draw whatever he wants whenever he wants. (Sienkiewicz is the definitive Warlock artist, though there's less of him in this than I remembered, sadly). He also famously likes to draw characters as shapes first, and nobody draws bulk like he does - to astonishing effect in the Demon Bear story itself and to less happy results when he realises (splendidly, but grossly) Claremont's eyebrow-raising reworking of Karma.
Those developments - bringing out both the teenageness and the strangeness of the New Mutants - give the book an identity of its own for the first time. There are frustrations and missed opportunities - the Legion story should be fantastic but ends up feeling rushed, like neither creator had time to really tell the story they wanted. Claremont is at his most prolix, which can wreck the effect of some beautifully weird pages. And the non-Sienkiewicz issues here are a reminder of how easily the book can fall back on default rival-schools teen comic tropes. But this stuff, messy though it is, is remembered as the book's peak for a reason.