On March 25th 2012, Moordenar completed the Fangs of the Father, and has been slashing [Golad, Twilight of Aspects] and [Tiriosh, Nightmare of Ages] through bosses ever since. To see Moordenar unleash hell simultaneously on a Claw of Go’rath and Zon’ozz is a thing of beauty.
The perk for Fangs of the Father is the ability to spread your wings and slowfall, which in addition to [Orb of Deception], Nitro Boosts, Flexweave Underlay and /dance gives Moordenar another great way to make an entrance!
If you want to get an impression of the legendary quest line for the fangs, Blizzard has released a series of videos showing the quests in motion.