32 printings of Unsummon
They range from $0.08 to $51.51 — a 644× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| Summer Magic / Edgar | SUM 87 | — |
| Seventh Edition | 7ED 108★ | — |
| Rivals Quick Start Set | RQS 13 | — |
| Eighth Edition | 8ED 112★ | — |
| Limited Edition Alpha | LEA 86 | $51.51 |
| 30th Anniversary Edition | 30A 383 | $17.72 |
| Limited Edition Beta | LEB 87 | $13.13 |
| Introductory Two-Player Set | ITP 14 | $5.25 |
| Intl. Collectors' Edition | CEI 87 | $5.20 |
| 30th Anniversary Edition | 30A 86 | $5.00 |
| Collectors' Edition | CED 87 | $3.86 |
| World Championship Decks 2003 | WC03 dh112sb | $2.90 |
| Unlimited Edition | 2ED 87 | $1.05 |
| World Championship Decks 2003 | WC03 dh112 | $0.65 |
| Duels of the Planeswalkers | DPA 17 | $0.33 |
| Seventh Edition | 7ED 108 | $0.29 |
| Magic 2013 | M13 75 | $0.25 |
| Foundations | FDN 750 | $0.25 |
| Core Set 2020 | M20 78 | $0.24 |
| Fifth Edition | 5ED 132 | $0.24 |
| Foundations | FDN 599 | $0.22 |
| Hour of Devastation | HOU 54 | $0.20 |
| Magic 2011 | M11 78 | $0.18 |
| Revised Edition | 3ED 87 | $0.16 |
| Classic Sixth Edition | 6ED 103 | $0.15 |
| Magic 2012 | M12 79 | $0.13 |
| Fourth Edition | 4ED 111 | $0.12 |
| Conflux | CON 37 | $0.11 |
| Tenth Edition | 10E 122 | $0.11 |
| Magic 2010 | M10 79 | $0.09 |
| Eighth Edition | 8ED 112 | $0.08 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.