Zendikar: Valakut, the Molten Pinnacle
Valukut, the Molten Pinnacle enters the battlefield tapped.
Whenever a Mountain enters the battlefield under your control, if you control at least five other Mountains, you may have Valakut, the Molten Pinnacle deal 3 damage to any target.
: Add to your mana pool.
Valakut may not look like the kind of card that kills out of nowhere, but make no mistake; it is. When paired with Scapeshift and six other lands it deals 18 damage. Add another land to make it 36. Primeval Titan is another card that teams up well with Valakut, churning out huge amounts of damage as it searches up lands and tramples over defenders.