3 printings of Urza's Avenger
They range from $0.42 to $15.09 — a 36× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| Antiquities | ATQ 74 | $15.09 |
| Fourth Edition | 4ED 355 | $0.42 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.