Zoro's ability to use the Nine Sword Style symbolizes his evolution as a swordsman.
especially someone that Zoro dreams to defeat, has access to all forms of Haki on a very high level, likely comparable to the likes of the Yonko. Clearly, any Yonko-level Haki user is above Zoro ...
To counter Zoro's best power, Lucci used the ability of his Neko Neko no Mi, Model: Leopard in its awakened form. Clearly, both of them were going all out in this battle, and that just went to ...