Sanji said this last chapter
Then
Sanji developed an even stronger CoA in the middle of the fight, but dont fool youself, thats actually just what Sanji thinks it is..
It's clear as day that he felt something else different with his CoA coating, he thinks he suddenly developed something new exclusively for the Exoskeleton in a spawn of 6 chapters, but thats not simply CoA





Editor's note chapter 1031
Then Oda draws Ifrit Leg with white CoC sparks so it wouldn't be that obvious for us, it would overshadow Zoro's CoC on 1033










What Oda did drawed:
What he actually wanted to draw:
Confirmed Ifrit Leg is Devil Leg + CoC, he is just developing it



IT'S SO OBVIOUS NOW @MonsterZoro









Then

Sanji developed an even stronger CoA in the middle of the fight, but dont fool youself, thats actually just what Sanji thinks it is..
It's clear as day that he felt something else different with his CoA coating, he thinks he suddenly developed something new exclusively for the Exoskeleton in a spawn of 6 chapters, but thats not simply CoA





Editor's note chapter 1031

Then Oda draws Ifrit Leg with white CoC sparks so it wouldn't be that obvious for us, it would overshadow Zoro's CoC on 1033










What Oda did drawed:


What he actually wanted to draw:


Confirmed Ifrit Leg is Devil Leg + CoC, he is just developing it



IT'S SO OBVIOUS NOW @MonsterZoro














