Your search for "Obsidian Fireheart 140" revealed the following:
Obsidian Fireheart (ZEN) from Zendikar, available at 401 Games Canada. Rarity: Mythic Rare Finish: Normal Artist: Raymond Swanland Card Text:1RR: Put a blaze counter on target land without a blaze counter on it. For as long as that land has...
Obsidian Fireheart (Foil) (ZEN) from Zendikar, available at 401 Games Canada. Rarity: Mythic Rare Finish: Foil Artist: Raymond Swanland Card Text:1RR: Put a blaze counter on target land without a blaze counter on it. For as long as that land...