No, you dont understand me, it is normal quest, normal mini-boss, not gar kolosus:) But on sacred-wiki is the map with mini-bosses and this boss isnt marked in the map. His name is Lupus Coldhand and is normal person in Ruka city, after completing several quests he turns into mini-boss if you kill him you get about 20k experience in silver and he dropped the Hunting amulet.