In short, there are multiple reasons to assume the ConquerorвЂ™s Haki showcased on rooftop was an advanced form- but not similar to the one Luffy or Kaido utilize, as evident by the lack of similar visuals and KaidoвЂ™s own shocked reaction. ConquerorвЂ™s Haki being behind it makes most sense. And unlike, say, DJ, Oda has given no explanations at all, and had Zoro use it VERY minimally. This might also be able to perfectly explain the concept of Asura: is a sudden manifestation of limbs and heads that not only boost ZoroвЂ™s prowess, but also act as physical parts of bodiesвЂ¦ thereвЂ™s absolutely no explanation as to why Zoro, a human without any Devil Fruit, would be able to pull off something like this.If it was just a basic, passive burst of Haki, Kaido would not be surprised by it to this extent, and Zoro, who has experienced it many times before and is familiar with its pressure, would not be unsure of whether he used it or not. This can perfectly explain ZoroвЂ™s reaction.There are no black lightnings, haki leaks, or anything that clearly signifies usage of said Haki barring KaidoвЂ™s words. But similar to KaidoвЂ™s reactions, another enigma is that we see absolutely no visible presence of ConquerorвЂ™s Haki at all.Another thing to note is that Kaido states Zoro can useВ ConquerorвЂ™s Haki rather than simply having it- and while the choice of words isnвЂ™t that big of a deal, given the context, there is heavy implication that Zoro somehow utilized certain form of Conqueror during his attack- implementing the haki in his attack.

This isnвЂ™t like Luffy where he calmly realized the ConquerorвЂ™s following the basic, passive usage of it. He almost seems unsure for a moment as he exclaims the question. The enigma here is that Kaido is shockedВ at the usage.

The fact Kaido feels any presence of ConquerorвЂ™s Haki from Zoro pretty much solidified its usage (specially from narrative perspective), no doubt about it.

He knows the Haki in question like the back of his hand. From Rocks, Whitebeard and Big Mom, to fighting against Roger, to fighting against Oden, to facing off with Shanks, to defeating both Eustass Kid and Luffy during recent events.

First thing to immediately note is that not only Kaido possesses ConquerorвЂ™s Haki himself, but he has lived around its users for his entire life.

For example, hereвЂ™s a clear-cut comparison with LuffyвЂ™s Marineford release: Rooftop moment IвЂ™m aware (or at least I think) that there has been a few other instances of similarly drawn moments, but given the context, comparison is important. With similar motion lines drawn around ZoroвЂ™s face, only to be followed by a pig panel of those lines centered around ZoroвЂ™s body, again. Lastly, that scene in itself is very comparable to most other scenes involving ConquerorвЂ™s Haki. He simply answered that he was not the reason behind the ground literally tearing itself apart.

As for ZoroвЂ™s response, he obviously did not say anything regarding him releasing or having ConquerorвЂ™s Haki.Additionally, Brook never showed surprise at or questioned whether Zoro has the said haki or not he merely expressed wonders at the effects taking place. It dumbfounded him and he found it beastly because this was the first time he ever witnessed вЂњConquerorвЂ™sвЂќ causing such effects, so he immediately brings it up. That also explains why heвЂ™d shockingly ask the question- feeling the ConquerorвЂ™s Haki being released, only to be followed up what looked like an Earthquake.ThereвЂ™s absolutely no reason as to why heвЂ™d blindly assume that ConquerorвЂ™s Haki is being released without feeling the heavy pressure of it, which Brook is evidently very familiar with.В Specially when he doesnвЂ™t associate earthquakes with ConquerorвЂ™s or Haki in general. Brook is also someone who has witnessed ConquerorвЂ™s Haki up-close multiple times, and he obviously knows what the haki is.There are several points regarding this scene which seem to imply that Zoro actively made light use of basic ConquerorвЂ™s Haki (which happened to be at the same time as Kaido lifting Onigashima up) in this scene: You can argue that he was a bit too jaded to notice, but that in itself is stretched excuse. If he used a passive burst of ConquerorвЂ™s Haki against Kaido by unlocking it during that moment, itвЂ™d make absolutely no sense for Zoro, someone who is very much familiar with and can identify the release of said haki, to be confused about what just happened- he already knows what the sensations feel like. In fact, in the panel above, there are heavy implications that heвЂ™s already able to utilize it the comment (even if he said it jokingly) makes very little sense otherwise. That much is already established- and it means that Zoro, unlike pre-timeskip Luffy, is not clueless about what happens when he or anyone releases passive bursts of ConquerorвЂ™s.

Haki one piece marineford episode