Your search for "Mossfire Valley 378" revealed the following:
Mossfire Valley (TDC) from Tarkir: Dragonstorm Commander, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: John Avon Card Text:1, T: Add RG.
Mossfire Valley (TDC) from Tarkir: Dragonstorm Commander, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: John Avon Card Text:1, T: Add RG.