User blog comment:IamJakuhoRaikoben/Chapter 456: Order, Review./@comment-24102956-20151013095648/@comment-7418318-20151013171213

Even if she could really shrink the entire city or country, that'd be a pretty stupid move.

Remember that they came to Magnolia for an objective, namely Lumen Histoire. Sinking the entire place, turning it tiny or something similar won't get them LH.