User blog comment:IamJakuhoRaikoben/Chapter 433 & 434: Ikusatsunagi & Demolition Fist, Review./@comment-76.121.234.236-20150512023224

I'm speculation that chapter 433 & 434 that Natsu owning Arlock and the War God Ikusa-Tsunagi is due to END's slowly awakening or Dragonify due to Natsu's Antibodies is possibly weakening or Natsu's true strength of the Dragon Slayer awaken due to 1 year training without Igneel interfering or all together.

I'm guessing that Ikusa-Tsunagi and Arlock would won the fight if the opponent were just to be only Erza, Gray, Lucy, Wendy, Carla, Happy, and/or Juvia. Due to I find it a bit weird that a god getting owned so easily. The only person that owned Ikusa-Tsunagi is Natsu not them(Erza, Gray, Lucy, Wendy, Juvia, Happy, and Carla), they didn't even help Natsu due to Ikusa-Tsunagi appearing out of nowhere and strike the ground!

Like think about it, nobody(Readers/Fans) knows on how strong or powerful that the Yakuma Eighteen War Gods are, like Arlock seem to be confidence that Ikusa-Tsunagi would win and only to be shocked due to Natsu owning the God! Like Erza, Gray, Lucy, Juvia, Wendy, Carla, and Happy reaction to Ikusa-Tsunagi are shocked and possibly fear due to it strength. And worst of all, they didn't even tried to fight the War God and all they do is nothing but watch Natsu owning the War God which make them look useless!

I'm guessing that the Yakuma War God are powerful due to blah, blah, blah from Mavis, Arlock, Erza, and possibly others know about it more.