Some demons pledge allegiance to no one but themselves.  A true enemy of demons finds and destroys his prey regardless of affiliation, however.$B$BThe demon Xeleth - a Legion defector - was once worshipped as a god by primitive swamp creatures in Zangarmarsh.  When Draenor was nearly destroyed, he retreated into a slumber deep beneath Marshlight Lake.  Find the portal at the lake and plant this spear into the ground.$B$BXeleth will awake - be ready to slay him and prove you're an enemy to all demons.