The Cyculs live in cities.

They do not like people. A lot.

These Beasties are attracted to the deep vibration of elevated trains and metros because of the doom people feel while waiting next to rails.

These Beasties have also learned to lay in wait for groups of runners, attracted by their stomping. The Cyculs will interdimensionally shift and trip joggers to feed on their stunned surprise and embarrassment. Whenever you trip on a sidewalk crack, that’s a Cycul.

They can be bribed with sour candy, a secondary food source. Put a few pieces in the sidewalk cracks by your door and they’ll leave you alone.