I agree Nick8383, when I first saw the list I thought he was only running 2x Stormbreath Dragon and saw a previous comment talking about making the most use out of his ult. In all honesty, cycling his +1 for card advantage and his -2 for board advantage is the best way to make use of Sarkhan Unbroken by far. Going for his ult is too greedy in a format littered with Hero's Downfall.

However, I do prefer Sylvan Caryatid over Rattleclaw Mystic in this deck. Since it already has a lot of aggro built into the creature base, the deck doesn't really need the 2 power that Rattleclaw provides, though it could purely be a meta call if the deck owner is in a meta plagued with Goblin Rabblemaster and the like, but i would really prefer just replacing Temur Charm with Magma Jet if that were the case.

Also, Atarka's Command, in my opinion, if far more versatile than Temur Charm. After some extensive testing with Temur Charm, and a strong want to like the card, I just can't recommend it in any competitive Temur build. It just doesn't synergize as well as it should.