The creeper is a strain of primal zerg spawned by Slivan. They detonate a few seconds after reaching their target in a manner similar to banelings, but move slowly, hence allowing Kerrigan time to move out of the way even as they begin to detonate.
The creeper is a strain of primal zerg spawned by Slivan. They detonate a few seconds after reaching their target in a manner similar to banelings, but move slowly, hence allowing Kerrigan time to move out of the way even as they begin to detonate.