With the Rapid Fire deck, you'll crush the opposition under a sudden avalanche of creatures. By the time they know what hit them, they'll already be buried!
Many of your creatures have landfall abilities that trigger when your lands enter the battlefield. Fledgling Griffin and Geyser Glider both gain flying, Steppe Lynx grows in size, and Cosi's Ravager damages your opponent. Kor Cartographer and Pilgrim's Eye help those landfall creatures by finding you more lands. Use your creatures to unleash an early assault on your opponent. If your attack stalls, you can use all the lands you've accumulated to summon Mordant Dragon, who can devastate your opponent's life total and creatures with a successful attack.
Use your spells to keep the pressure on your opponent. Searing Blaze deals damage to both your opponent and a creature, while Magma Rift removes all but the largest creatures your opponent might have. If your opponent casts a single creature that is too large for you to handle, use Act of Treason to turn it to your side. Armored Ascension enlarges one of your creatures and vaults it over the opposing defense.
Look for other Magic cards to enhance the Rapid Fire deck. The Zendikar expansion's Plated Geopede is another small creature with a landfall trigger to support your early assault. In the Worldwake expansion, you'll find Kazuul, Tyrant of the Cliffs, a brutal Ogre who punishes your opponents for attacking you by giving you 3/3 Ogre creature tokens unless they pay 3 Mana for each attacking creature. You'll also discover Admonition Angel, a 6/6 flying creature that exiles a permanent every time a land enters the battlefield under your control. Those permanents return if the Admonition Angel leaves the battlefield, but your opponent won't have much time to make that happen before you win!