User blog comment:IamJakuhoRaikoben/Chapter 495: I'm Hungry As Hell, Review./@comment-5672982-20160725171838/@comment-88.145.190.16-20160729135204

Gildarts is obviously going to win by Hiro logic but realistically Serena could just kill him by using his earth DS to create a big hole for him to fall into, Gildarts uses crash to break his fall and subsequently causing the hole to collapse burying him alive; essentially Serena could win by using Gildarts' own power against him.