Group Challenge Enemy
Abomination Elite enemy in the Root Sunder Ruins Dungeon, level 18.
This is the Group Event boss for this dungeon and will only appear after dousing the torch in the very Northeast room of the ruins. Waves of skeletons will charge at you after dousing the flame and you must fight them off for several minutes before they summon him. Killing The Bonemonger will grant 1 Skill Point. You do NOT have to get the last hit on him.
Counts towards achievements: