Despite the name, Double W is a leech-like alien with human-level intelligence. He could attach himself to a host and could it's nervous system. He also discover if he sliced apart, he'll regenerate his body and the detach part would turn into identical being (like flatworms). So he used this power to make an army of him-selves. They "enveloped" a host body and became Horde (Similar the Marvel's villain Swamp), who is made out of bees. So the started to terrorize Chicago.