Of the three rewards coming to the TCG loot cards, this Spectral Tiger Mount probably got the most attention-- not only is it a sweet looking mount (ok, it's a freaking amazing looking mount),
We don't yet know, as MMO Champion notes, whether it's an epic or a normal ground mount-- Boubouille apparently ducked into a private realm for the video, and apparently there are two spells (one 60% and one 100% speed) for the mount itself. So that could mean that Blizzard is still deciding, or it could actually mean that there are two of these mounts in game-- one at 60% from the TCG loot cards, and an epic mount yet to be discovered.
At any rate, looks awesome. Will this entice you to grab a few TCG packs, or does the fact that Blizzard wants you to pay real money for a mount you probably won't get just disgust you?
*Update: Of course Horde can ride the rare Tiger mount from ZG. My bad.