17 cards where the cards are any language and the name is exactly “undo”

Set Name Cost Type R La Artist USD EUR TIX
S99 58 Undo {1}{U}{U} Sorcery U EN Terese Nielsen $0.22 €0.55
P02 59 Undo {1}{U}{U} Sorcery U EN Henry Van Der Linde $0.23 €0.51
VIS 47 Undo {1}{U}{U} Sorcery C EN Terese Nielsen $0.11 €0.24 0.04
P02 59 Loslösen {1}{U}{U} Hexerei U DE Henry Van Der Linde
P02 59 Cancelar {1}{U}{U} Sorcery U ES Henry Van Der Linde
P02 59 Annulation {1}{U}{U} Sorcery U FR Henry Van Der Linde
P02 59 Annullare {1}{U}{U} Sorcery U IT Henry Van Der Linde
P02 59 再帰 {1}{U}{U} Sorcery U JA Henry Van Der Linde
P02 59 Desfazer {1}{U}{U} Sorcery U PT Henry Van Der Linde
VIS 47 Loslösen {1}{U}{U} Hexerei C DE Terese Nielsen
VIS 47 Cancelar {1}{U}{U} Sorcery C ES Terese Nielsen
VIS 47 Annulation {1}{U}{U} Sorcery C FR Terese Nielsen
VIS 47 Annullare {1}{U}{U} Sorcery C IT Terese Nielsen
VIS 47 再帰 {1}{U}{U} Sorcery C JA Terese Nielsen
VIS 47 Undo {1}{U}{U} Sorcery C KO Terese Nielsen
VIS 47 Desfazer {1}{U}{U} Sorcery C PT Terese Nielsen
VIS 47 Undo {1}{U}{U} Sorcery C ZHT Terese Nielsen

The message was clear to Sorin—time to search for something else.