26 printings of Mind Rot
They range from $0.05 to $0.23 — a 5× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| Eighth Edition | 8ED 144★ | — |
| Ninth Edition | 9ED 145★ | — |
| Seventh Edition | 7ED 147★ | — |
| The List | PLST W16-7 | — |
| Duels of the Planeswalkers | DPA 27 | — |
| Tenth Edition | 10E 159 | $0.23 |
| Ninth Edition | 9ED 145 | $0.21 |
| Return to Ravnica | RTR 70 | $0.19 |
| Core Set 2021 | M21 115 | $0.19 |
| Magic 2014 | M14 106 | $0.17 |
| Portal | POR 101 | $0.15 |
| Kaladesh | KLD 93 | $0.13 |
| Core Set 2020 | M20 108 | $0.12 |
| Magic 2010 | M10 105 | $0.11 |
| Starter 1999 | S99 83 | $0.11 |
| Seventh Edition | 7ED 147 | $0.10 |
| Dragons of Tarkir | DTK 110 | $0.10 |
| Core Set 2019 | M19 109 | $0.08 |
| Magic 2011 | M11 105 | $0.08 |
| Magic 2012 | M12 101 | $0.07 |
| Eighth Edition | 8ED 144 | $0.07 |
| Magic 2013 | M13 100 | $0.06 |
| Magic Origins | ORI 281 | $0.06 |
| Welcome Deck 2016 | W16 7 | $0.06 |
| Magic 2015 | M15 104 | $0.05 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.