Pointing out that it seems Zunisha is talking about Luffy's heartbeat as the "Drums of Liberation".
On the double spread where Kaido is victorious, there a "しーん" sfx, which indicates no sound coming from Luffy (i.e. he's "dead").
Then on the second to last page, the sfx "ドクン" is placed on Luffy, which indicates a heart beat. Right after this, Zunisha makes his comment about Joyboy.
I have couple years college Japanese experience, so this is how I took it, but if any primary Japanese speaker wants to confirm or disagree, feel free.
On the double spread where Kaido is victorious, there a "しーん" sfx, which indicates no sound coming from Luffy (i.e. he's "dead").
Then on the second to last page, the sfx "ドクン" is placed on Luffy, which indicates a heart beat. Right after this, Zunisha makes his comment about Joyboy.
I have couple years college Japanese experience, so this is how I took it, but if any primary Japanese speaker wants to confirm or disagree, feel free.
Kaido killed Luffy with that attack... HAHAHAHAHA!!! KAIDO KILL LUFFY, KKL.
Kaido eternally goated