During the war between Montaigne and Castille, one of the many tactics used by the invading Montaigne was to have a Porte sorcerer transport a pack of wolves beyond enemy lines, often into secure keeps. The walk through the void drove the beasts insane. The sorcerer would unleash these crazed wolves and transport back safely while their distraction ran rampant.
Since then, there have been a few rare reports of what could only be the surviving wolves from these attacks. Large, black wolves, the size of ponies, have been seen flashing in and out of existance as they attack their prey. There haven’t been enough instances to note any connection or reason to these attacks, perhaps there are none, but it has been noted that these Black Wolves are always solo.