Roams inside the cocoon to Dreadspire; sees invis; does not see Shroud of Stealth.
Spawns adds called "an enraged hatchling" which may be health-based, two at a time? (first set appears at 90%?).
On aggro: Drithnak the Exiled says 'Be gone from my sight, weakling. I strike you down as I will your comrades, _____.'
On a kill: Drithnak the Exiled licks its lips just before it plunges fangs into the corpse.