EARLY: (1 mana cost)
Play at least one Plains, Mountain, and Forest. Then play Kird Ape, Loam Lion, and Wild Nacatl. They can deal 7 damage a turn with all 2 land types together. Use Path to Exile or Pillar of Flame to destroy creatures getting in the way.
MID: (2 mana cost)
Cast down Tarmogoyf and Flinthoof Boar. When all card types are in graveyard, you can be swinging for 8 damage from Tarmogoyf, and 3 from Flinthoof Boar; a total of 11 damage. With Kird Ape, Loam Lion, and Wild Nacatl on the field and attacking also, you can deal a solid 18 damage total.
END: (3+ mana cost)
Play a Loxodon Smiter on the field. It can't be countered, so it's mostly a game ender. If it gets killed you can finish off opponent with Lightning Bolt and Lightning Helix, dealing damage and gaining a bit of life back.