Your search for "Discreet Retreat 20" revealed the following:
Discreet Retreat (OTC) from Outlaws of Thunder Junction Commander, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Ben Wootten Card Text:Enchant landEnchanted land has "T: Add two mana of any one color. Spend this mana only to cast...
Discreet Retreat - Extended Art (OTC) from Outlaws of Thunder Junction Commander, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Ben Wootten Card Text:Enchant landEnchanted land has "T: Add two mana of any one color. Spend this mana...