You see a charged energy elemental
Notes
They are found in a knight-only accessible area (accessed from the Ivory Towers in Edron), after the Summer Update 2009 they are weak to Physical Damage.
Abilities
Damage Taken From Elements
Physical
Death
Holy
Ice
Fire
Energy
Earth
Location
Behaviour
Fights until death.
Strategy
A knight of level 80 or higher should have no problem killing them. When they come in a larger pack of creatures you could use Whirlwind Throw to speed up killing and Berserk or Fierce Berserk when more elementals are lured. Remember to bring food, because they don't drop any food.