Continued from
One moment there is a stretch of ordinary burrow under the city. What's supposed to be an pit trap and packed earth walls. The next, the air halfway down the passageway tears apart. The edges of the tear fold back on themselves. Loose soil lifts off the tunnel floor and hangs in the air and then evaporates like morning dew.
Then the pull starts. It is quiet, and very strong. Something is being pulled through. Something from the Other side.
Oops.