The last clan of Tarkir I took a look at was the contemplative and enlightened group of blue-red-white worshipers of Cunning and the Dragon's Eye, the Jeskai Way. Next up is a clan with a very different color combination - sharing white in its colors with the Jeskai, as well as a slower and more thoughtful approach, but also with some very different values, emotions and mindsets. Once again, on the clan system:
The one major mechanical-slash-flavorful thing we know about Khans of Tarkir is that during the time period that the first set of the block takes place in (for this is a block that doesn't take place in a linear time fashion, as it were), the wartorn plane of Tarkir is divided up between five warring clans, each representing a "wedge" tricolor combination. Usually, this means a color and its two enemies, but for Tarkir this represents a color, one allied color, and one enemy color, for reasons that have yet to be explained (though this is the same as the usual idea in most practice).
The clans have a love-hate relationship with Dragons - having killed the species all off, they continue to revere one aspect of the great monsters, and embody that with a symbol drawn from a Dragon body part.
Today's subject are the outsiders and underdogs of Tarkir, those that revere Endurance as they struggle in the arid wastelands of the plane. These are the Abzan Houses, who are white-centered and also include black and green, and whose apropos symbol is the Scale of the Dragon, considering this is the (salvaged) material from which much of their most prized armor is made.
The Abzan are fatalistic but tough, and are ferociously protective of those they love and trust. "Houses" isn't just a name - these people form families with their comrades, and are willing to adopt the lost and orphaned.
The Abzan khan is named Anafenza, a woman of unstoppable conviction who rides into battle on an ibex-drawn chariot.
This clan seems to be aesthetically based on the Persian and Ottoman empires, with emphasis on tight ranks of elite fighters (think janissaries or Persian immortals) and clean geometric designs.