You see a party skeleton.
Notes
New players test different weapon types on these creatures. Sometimes they may appear to be teleporting, but this is actually caused by magical boundaries preventing them from leaving the party tents.
Abilities
Melee (0-3)Damage Taken From Elements
Physical 
Death 
Holy 
Ice
Fire
Energy
Earth
Drown
Location
Behaviour
Unknown
Strategy
Just follow the guidelines from the Guide NPCs on how to attack them.