Walk the Abyss
Masters of Obtenebration can enter a patch of darkness that is large enough to admit them and step through an otherworldly space to emerge in another shadow roughly within eyesight of the first. The abyss between shadows is a twisted and unholy place, described by soem as Ahriman itself, as its resting place or as a circle of Hell. Regardless, exists such that any two shadows within 25 yards or so are just a step apart. This also means that the Cainite can lean into one shadow, using this power, and grab someone or something that is within arms reach of a remote shadow to pull it to her location.
System: The player should pick an exit point and check with the Storyteller to ensure that both your entry and exit shadows are large enough to admit the character (they must be at least roughly human-sized). If the Storyteller allows it, the player rolls Intelligence + Stealth (difficulty 7) for the Lasombra to step through shadow successfully. If instead the vampires intends to grab something near the distant shadow, the player rolls Intelligence + Brawl (difficulty 7). One success is enough to grab the target, and two are necessary to pull it through the darkness. A failure on this roll indicates that the vampire cannot reach the target; a botch means that something either comes out of the shadow or pulls the character in.
The vampire can Walk the Abyss between shadows separated by a maximum of five yards times his Intelligence + Stealth total. The player must also make a Courage roll (as must any passengers). The difficulty is 5 for anyone with Obtenebration, and 7 otherwise. Failure indicates panicked collapse or Rotschreck upon coming through the shadow. A botch on this Courage roll by the player leads to her character panicking to such an extent as to become lost in the Abyss. The player must make another Intelligence + Stealth roll to reopen a gateway. The Storyteller is free to determine just how far the character has traveled and how long she has been in the Abyss. Disappearances of several years are not unknown.