Ninth Edition9ED 145★
Mind Rot
common in Ninth Edition
No price for this printing yet. That is not the same as worthless — the feed simply has no listing for it.
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.
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.
Seventh Edition
7ED 147★—
Duels of the Planeswalkers
DPA 27—
Eighth Edition
8ED 144★—
The List
PLST W16-7—
Tenth Edition
10E 159$0.23
Ninth Edition
9ED 145$0.21
Core Set 2021
M21 115$0.19
Return to Ravnica
RTR 70$0.19
Magic 2014
M14 106$0.17
Portal
POR 101$0.15
Kaladesh
KLD 93$0.13
Portal Second Age
P02 78$0.13
Core Set 2020
M20 108$0.12
Starter 1999
S99 83$0.11
Magic 2010
M10 105$0.11
Seventh Edition
7ED 147$0.10
Dragons of Tarkir
DTK 110$0.10
Magic 2011
M11 105$0.08
Core Set 2019
M19 109$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