7 printings of Mystic Retrieval
They range from $0.25 to $2.31 — a 9× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| The List | PLST INR-77 | — |
| Innistrad Remastered | INR 363 | $2.31 |
| Innistrad Remastered | INR 77 | $0.30 |
| Commander 2015 | C15 98 | $0.29 |
| Ultimate Masters | UMA 66 | $0.26 |
| Dark Ascension | DKA 42 | $0.25 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.