4 printings of Mishra's War Machine
They range from $0.41 to $8.89 — a 22× 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 266 | — |
| Antiquities | ATQ 57 | $8.89 |
| Fourth Edition | 4ED 337 | $0.41 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.