No other description of this one was provided in the Blizzcon build. Range, % of working, effect on monsters, rage cost, etc. Presumably it would be useful to bring running enemies in close, but aside from some very low damage bats, there weren't any monsters seen in the BlizzCon demo who didn't do this anyway. Perhaps the skill causes ranged attackers and monster mages to move into melee range? Or could it be useful in multiplayer games to lure dangerous foes away from weaker party members?