Defeating Pagurus without taking damage (either health or shell damage). This was the fifth boss for me although I suspect this boss is more to discourage you from going off the path and coming back to it later. I opted to bang my head against the wall until I won instead.

I couldn't consistently parry his five-hit combo but found parrying the first hit, riposting for iframes over the next two hits and then dodging the rest worked fine.

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