You see Troll Legionnaire
?
Notes
New creature in the summer update 2009. They can be found in an area accessible during making Royal Rescue Quest.
Abilities
Melee (0?), Throwing Stars (0-100?), Invisibility, Self-Healing(fast).
Damage Taken From Elements
Physical 
Death 
Holy 
Ice 
Fire
Energy
Earth
Location
Old Beregar mines.
Strategy
They will most likely be invisible all the time, as they re-cast invisibility before the effect wears off (like Stalkers), therefore shot area runes or spells or change floor for a while to make them visible.