It's time to wank the shit out of Zoro's attack on Kaido this chapter.
Kokujo Ou Tatsumaki is a mid tier attack that Zoro uses for crowd control. Here's him mowing down fishmen with it:
In raw attack potency, it isn't that great. It wasn't even powerful enough to break through Kaku's tekkai:
However, in this chapter Zoro is able to significantly damage Dragon!Kaido with it. Kaido used his Hybrid form afterwards, so Zoro's attack might have been the cause. If I'm inferring correctly, Zoro's Kokujo Ou Tatsumaki dealt the most damage of all Supernova attacks.
Here's the spoiler provider's drawing of it:
We do not see the same overflowing hardening that was present on Hiryuu Kaen. Zoro may simply not be able to overflow his hardening through all 3 of his swords when wielding Enma, or perhaps he's still recovering from Hiryuu Kaen. Regardless, this attack wasn't boosted to the same degree Hiryuu Kaen was. The implication, is that Zoro is capable of even stronger versions of this attack.
If an attack that couldn't break Kaku's tekkai can hurt Kaido through his Dragon Scales, imagine what Zoro's higher AP attacks like Shi ShiShi Sonson, Nigori-Zake or 1080 Pound Cannon could do.
Santoryu Zoro continues to demonstrate insane offensive prowess.