This has been out for a few days now, but I thought it was worth sharing for those who may not have seen it.
Wizards of the Coast has been doing these teaser trailers for a while now, and I have to say they're getting better every time. I'm not sure how they make all the cool effects we see in the videos, but it's enough for me to see that they are doing it. I can appreciate how cool it is as-is.
And trust me, it is.
I have to say that the trailer for Khans of Tarkir is the best yet, and you can find the full video here.