The Spring-heeled Jack is a terrifying subspecies of Grey, engineered to hunt dissidents within the domain of the Convergence. Standing quite tall, (average height is about three meters), Jacks are capable of high speed and able to make extraordinary vertical leaps with their long legs. Spring-heeled Jacks have six arms, and two legs, and tend to be nocturnal. As a part of their horrific design, spring-heeled jacks have been engineered to be almost entirely carnivorous, preferring the challenge of hunting sentient prey.
Spring-heeled Jacks are a non-reproductive subspecies of Grey. They lack the spore-depositor gland in the center of their chests that other Greys have, but do have a vestigial nub of sensitive flesh in the same location that is one of the few vulnerabilities they possess in hand-to-hand combat. This is guarded, however, by their long, sharp tongues that never retract fully into their mouths, but are often used as a deadly weapon.
Spring-heeled Jacks were first deployed against the Bleen during the war that founded the Iblexian Empire, as a way to terrorize them into accepting Convergence rule. This did not end well for the Convergence, but the Spring-heeled Jack has remained a viable tool in their campaigns of dominance and manipulation ever since.
Their tall stature and eerie appearance earned them the name in comparison to the figure from Victorian folklore, and at a distance, their coloration may cause one to mistake a Spring-heeled Jack for a tall, slim man in a suit. Although no clear records are intact, the stories have caused some speculation if the Convergence may have visited Earth as early as the 19th century.
