Oda def didn't know wtf to do with King, none of Zoro's attacks worked on King flame on later on, even with KoH Zoro made it clear he needs to land the attack when the flame turns off.

It's a stupid ability and he didn't do a great job at elaborating when the flame goes off - he made them invincible as long as their flames are on.
The final attack was literally vs king with flame on. And there are multiple scenes of flame on king blocking attacks and Zoro saying why are you blocking is it because you're scared of getting hurt
 
these rat leakers keep information from us, that was the last straw im going to they local police to snitch on them. help me get they real life information they done for. leakers that is my last warning when we dont get spoilers in 5h you guys done
:endthis:
 
Top