Board Thread:Theories and Speculation/@comment-25093611-20160322113057/@comment-26104757-20160323095514

maybe making her body unable to be hurt via physical attacks? think about the power to change their bones and fleh into a form that has a similar reaction as slug-bodys ^_^

Interesting.

Also, during the War — Tsunade and Sakura; both Byakugou was only able to summon 1/10 of Katsuyu. Now, imagine the size of her if Slug Sage Mode and Byakugou activated. She'd be leveling off with the size of the Ten Tails.