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Zoro having a cure with very bad side effects is an evidence that Zoro will have easier fight than against Kaido.
his current health might be even only enough to defeat King even if he goes later to help against Kaido again he will hurt him once more and then the side effects will come and Luffy will have to finish Kaido himself and Zoro will be down for days like after Thriller Bark
his current health might be even only enough to defeat King even if he goes later to help against Kaido again he will hurt him once more and then the side effects will come and Luffy will have to finish Kaido himself and Zoro will be down for days like after Thriller Bark