Rampant Growth (7) [Magic Player Rewards 2009] The Dark Set: March of the Machine:

Set: March of the Machine: The Aftermath Type: Legendary Artifact Creature — Golem Rarity: mythic Cost: {5} Karn's power and toughness are each equal to the greatest mana value among artifacts you control

or Mountain card

Set: Black and White Promos Rarity: Rare

Set: Limited Edition Beta Type: Instant Rarity: uncommon Cost: {G} Cast this spell only before the combat damage step

Rampant Growth (7) [Magic Player Rewards 2009] The Dark Set: March of the Machine:Set: Magic Player Rewards 2009 Type: Sorcery Rarity: rare Cost: {1}{G} Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.