10 Man Regular
This is a first look at Magmaw, the Blackwing Descent raid boss. He is a giant, stationary fire worm that spawns adds and spews fire everywhere. AOE down the parasites as soon as they spawn.
When the boss falls over, have some of your DPS jump on his back. Though I'm not certain yet, it appears the right number of people is 3. Once you are riding him, use the grab chain ability in your vehicle spell bar to somehow impale him on the big spike, causing him to take extra damage.
Fire Spew - a channeled fire AOE that hits the entire raid. Very tough to heal through.
Parasites - Summons a pack of worm adds. They are easy to group up and AOE down.
We didn't get enough tries to really confirm his abilities or the strategies, but this is a decent first look at Magmaw. A more thorough raid boss analysis and video will be coming in the future.