User blog comment:Kaido King of the Beasts/Gear Fourth: Luffy Turns Into...Nightmare Bellamy?/@comment-2.84.138.38-20150423130323

i don't think that there would negative effects .. I mean he said he needed gear 4 in order to fight the monsters in his training,so maybe he has trained it enough so as not to have side effects, or  i hope at least..AND hopefully Doflamingo will  counter it somehow, he cant beat him just like that...