Den

/setwaypoint 7112 3019 Just west of Sanctum Watch, looks like a tree stump with a green glow inside of it. When destroyed, an Alpha-Heuler and four Grubenheulers appear, and despawn after a couple minutes if not killed. Like the Offenes Grab, it's a non-elite rare spawn but doesn't count towards Die Üblen Feinde des Waldes, and it's near a common rift location.