You see a rift worm
Notes
Summoned by Azerus in the final room of the In Service of Yalahar Quest, Fenrock after the teleport for the quest Shadows of Yalahar Quest.
Abilities
Melee (0-160?)
Mana Drain (500-1000?)
Groundshaker area effect
Invisibility (5~ seconds)|
Rift Worm
  |
Damage Taken From Elements
Physical 
Death
Holy
Ice
Fire
Energy
Earth
Location
Yalahari palace and Fenrock
Behaviour
Unknown.
Strategy
Kill them first, because of the annoying mana drain.