User blog comment:CrimsonWarden/Time Stop and Time Stop Countermeasures/@comment-26144500-20160909111140

We've actually already had a scene where Ainz stopped time while most of the Floor Guardians were present. They could still move and talk, so they were obviously not affected(they thus had counter measures against time stop). That was in one of the first Drama CD, when Ainz turned the gigantic level 80 Treant into a Christmas tree.