Black Orbing is assumed to be a basic power of all Darklighters. The power works similarly to regular orbing, but with a more smokey effect, even to the point of being able to take passengers.
Harry Greenwood's Darklighter has demonstrated that a Darklighter can disguise their orbing to appear more like a Whitelighter's. In Deconstructing Harry, when the Darklighter came for Macy, there was no smoke around his orb, making it easier for him to trick Macy into believing he was Harry.
- Original Power