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One Piece chapter 1138 discussion (SPOILERS)
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What did you think of this week's chapter?
NO BREAK AGAIN LET'S FUCKING GO 
I don't think the giants really know all that much. The one reading the Harley text right now is Robin, but for the giants they said it was archaic which is why everyone has a different interpretation of Nika. They might know a little more about the Void Century because of their longer lifespans although they're a relatively isolated country too so there's not really many people to tell.