27 printings of Nightmare
They range from $0.15 to $1,399.99 — a 9333× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| 30th Anniversary Edition | 30A 412 | — |
| Tenth Edition | 10E 164★ | — |
| Seventh Edition | 7ED 150★ | — |
| Ninth Edition | 9ED 150★ | — |
| Eighth Edition | 8ED 150★ | — |
| 30th Anniversary Edition | 30A 115 | — |
| Summer Magic / Edgar | SUM 120 | — |
| Limited Edition Beta | LEB 119 | — |
| Limited Edition Alpha | LEA 118 | $1,399.99 |
| Unlimited Edition | 2ED 119 | $64.79 |
| Intl. Collectors' Edition | CEI 119 | $22.77 |
| Collectors' Edition | CED 119 | $17.23 |
| Revised Edition | 3ED 120 | $7.75 |
| Fourth Edition | 4ED 150 | $2.06 |
| Fifth Edition | 5ED 184 | $1.27 |
| Classic Sixth Edition | 6ED 146 | $0.95 |
| Seventh Edition | 7ED 150 | $0.55 |
| Eighth Edition | 8ED 150 | $0.44 |
| Tenth Edition | 10E 164 | $0.37 |
| The List | PLST W17-17 | $0.32 |
| Magic 2010 | M10 107 | $0.31 |
| Welcome Deck 2017 | W17 17 | $0.29 |
| Magic 2014 | M14 108 | $0.25 |
| Welcome Deck 2016 | W16 8 | $0.17 |
| Magic 2015 | M15 276 | $0.15 |
| Magic Origins | ORI 282 | $0.15 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.