The Rat Demon used it on Glen, in form of a ring and threatened to strangle him with it. It can be shaped into any form the user desires, it was also stated that some minions possessed this ability. "Either kill me or release me, Rennek. Just get it over with." — Leo to his jailer Rennek. The Darklighter Rennek also possesses this power, as shown in the comics when he created prison bars, a sword and metallic chains out of purple, shadow-like energy.