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The New Mutants #21 cover

Cover: Bill Sienkiewicz

The New Mutants #21

Nov 1984 · Marvel · 1.00 USD; 0.50 GBP; 1.25 CAD

📊 ~23,773 copies sold its debut month

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“Slumber Party!”

In "Slumber Party!", the New Mutant girls kick off a fun night with friends from Salem Center—until the sudden destruction of Asteroid M sends Warlock crashing near Xavier’s school. With chaos unfolding, the team calls on Doug to help bridge the gap, leading to an unexpected invitation that could change everything. Written by Chris Claremont and brought to life with bold, expressive art by Bill Sienkiewicz, the cover by Sienkiewicz captures the moment with striking intensity.

writer Chris Claremont · artist, inker Bill Sienkiewicz · colorist Glynis Wein · letterer Tom Orzechowski · letterer L. Lois Buhalis · cover Bill Sienkiewicz

ComicBooks.com Value

Our Model is In Beta

Raw (VF) $8

CGC 9.8 · 58 in census $133

CGC 9.6 · 47 in census $66*

CGC 9.4 · 24 in census $66

CGC 9.2 · 15 in census $33

CGC 9.0 · 12 in census $33*

CGC 8.5 · 7 in census $33

Show all 13 grades ▾

CGC 8.0 · 13 in census $31*

CGC 7.5 · 6 in census $27*

CGC 7.0 · 1 in census $24*

CGC 6.5 · 4 in census $23*

CGC 6.0 none in existence

CGC 5.5 · 1 in census $20*

CGC 5.0 · 1 in census $20*

* estimate — limited direct-sales data at this grade

Our model’s value — refined as new sales data arrives · CGC census counts shown where available

This exact issue on ebay

CGC 8 $54 1 listing

Raw — MINT ▾ $7–$20 4 listings

MINT $7 MINT $12.5 MINT $14.99 MINT $20

Raw — NM ▾ $3.95–$10 3 listings

NM $3.95 NM $7 NM $10

Raw — NM- $12 1 listing

Raw — VF/NM ▾ $5.49–$15 6 listings

VF/NM $5.49 VF/NM $5.99 VF/NM $6 VF/NM $9.9 VF/NM $9.99 VF/NM $15

Raw — VF+ ▾ $4–$8.95 3 listings

VF+ $4 VF+ $7.99 VF+ $8.95

Raw — VF ▾ $5.19–$9.98 7 listings

VF $5.19 VF $7.99 VF $7.99 VF $8 VF · Newsstand $8 VF · Newsstand $8.95 VF $9.98

Raw — VG $2.99 1 listing

Raw / ungraded ▾ $2.99–$30.6 23 listings

Verified matches for The New Mutants #21 · eBay asking prices, seen 20 days ago

More listings for this title

VF/NM $19.95 CGC 9.4 $49.95

Related listings we couldn't confirm as this exact issue · 2 total · seen 20 days ago

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Full credits

writer Chris Claremont

artist, inker Bill Sienkiewicz

colorist Glynis Wein

letterer Tom Orzechowski

letterer L. Lois Buhalis

cover pencils, inks Bill Sienkiewicz

Reprints

Reprinted in Titans #77 (1985), Titans #78 (1985), Marvel Spesial #6/1988 (1988), Die Gruppe X #16 (1990), The New Mutants: The Demon Bear Saga #[nn] (1990), I Nuovi Mutanti #17 (1990), I Nuovi Mutanti #20 (1990), Archivos X-Men #1 (1995), Marvel Visionaries: Chris Claremont #[nn] (2005), X-Men Classic #3 (2012), Marvel Icons : New Mutants #[nn] (2018), New Mutants Epic Collection #2 (2019), The New Mutants : L'intégrale #1984 (2019), Marvel Visionaries: Chris Claremont #[nn] (2019), New Mutants Omnibus #1 (2020), De New Mutants #11, Marvels universum #11/1988, New Mutants Classic #3, X-Men [Χ-Μεν] #70

Key issues in The New Mutants

#98

#98 1st appearance — Deadpool

#87

#87 1st appearance — Cable

#18

#18 1st appearance — Warlock

#16

#16 1st appearance — James Proudstar

#13

#13 1st appearance — Cypher

#8 1st appearance — Amara Aquilla

#29

#29 1st appearance — Guido Carosella

#99

#99 1st appearance — Shatterstar

Variants (2)

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