Your search for "Swamp 378" revealed the following:
Swamp - Judge Gift Cards 2014 (Foil) (J14) from Judge Gift Cards 2014, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Terese Nielsen
Swamp (849) (Surge Foil) (PIP) from Fallout, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Samuele Bandini
Swamp (1470) - Pixel Lands 02.jpg (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Jubilee Card Text: Pixel Lands 02.jpg
Swamp (378) (Foil) (2XM) from Double Masters, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Noah Bradley
Swamp (378) (2XM) from Double Masters, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Noah Bradley
Swamp (417) - Shades Not Included (Foil) (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Ben Schnuck Card Text: Shades Not Included
Swamp (033) (Foil) (SLP) from Secret Lair Promo, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: John Avon
Swamp (048) - The Tokyo Lands - Japanese (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Mr. Misang Card Text: The Tokyo Lands