Planeswalkers:
Sorin, Solemn Visitor - I can't say anything bad about this card even the -2 loyalty is useful. With creatures in play he demands removal, if you fail to do so standby as this deck just makes the opponents hope of winning decrease substantially.
Sarkhan, the Dragonspeaker - Another you must deal with it instantly or the game gets out of hand. I will tip my hat in favor of this guy over Stormbreath Dragon any day of the week.
Chandra, Pyromaster
- This card does not get as much respect as it should. The opponent drops a huge creature late game and Chandra will deactivate it's blocking ability. Then late game card advantage is beautiful.
Creatures:
Wingmate Roc - A very useful card. Dropping it on its raid ability is too much to deal with and is almost certain to gain life for you on the following turn.
Butcher of the Horde
- Card is just a menace to society. Playing it on turn with Rabble or Hordeling Outburst is glorious. I even played it on turn 5 after Sorin who went -2 on turn four to swing for lethal.
Goblin Rabblemaster - Pumps itself for 3 mana and generates tokens.
Seeker of the Way
- He is ok. I want something better here.
Spells:
Crackling Doom
- Honestly, no creatures stand in its way. Maybe the best card of the Khans release.
Magma Jet - Deals with those lil mana ramps and weenie cards while giving me card advantage.
Chained to the Rocks - I do not use this card until late game. Using it prematurely really sucks (speaking from exp)
Hero's Downfall - Instant removal of planeswalkers and that beastly Stormbreath Dragon
Hordeling Outburst - Is worth every tapped land. Instant board advantage (unless you are playing aggro) and synergy is great with Goblin Rabblemaster
Butcher of the Horde
and Sorin, Solemn Visitor
Lightning Strike - Good burn to finish the game or remove 3 toughness creatures. Mantis Rider I'm looking at you.
Mana:
Nomad Outpost - Having this in opening hand makes the game so much smoother.
Bloodstained Mire - Fetch and shuffle for 1 life may save you in a game. I will most certainly get the mountain I need for Hordeling Outburst or Chained to the Rocks or a swamp to pull off that end step Hero's Downfall
Battlefield Forge - More often then not I don't pain myself with the mana pool I have. But it will get me out of a tight squeeze.
Caves of Koilos - See above.
Wind-Scarred Crag - Gain a life on a tapped land. Plus I like saying Inu-Yasha when I play it.