8 printings of Thorn Elemental
They range from $0.26 to $0.84 — a 3× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| Seventh Edition | 7ED 273★ | — |
| Oversized 90's Promos | O90P 11 | — |
| Eighth Edition | 8ED 283★ | — |
| Urza's Destiny | UDS 123 | $0.84 |
| Seventh Edition | 7ED 273 | $0.38 |
| Eighth Edition | 8ED 283 | $0.35 |
| Dominaria | DOM 185 | $0.26 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.