User blog comment:SpiritedDreaming/RWBY: Attack on Kevin Tower Defense Game/@comment-26397825-20161011121047/@comment-25936766-20161012002237

Mmm....then the question would be about the initial Grimm numbers. Big enough to survive the initial onslaught, from the AKs and the players, but not big enough to be a horde from the get-go, instead requiring to build up over time.