Hi there,
actually i'm on the ogre isle, and a ogre lord spawned, but he is in the ground, not reachable with spells or melee or pets sending on it.
His exact position seems to be when on the isle directly below the right end of the bridge on the isle.
When hovering with the mouse about his location it says "An Ogre Lord", but he's not visible.
And i can drag his healt-bar from him also.