Powers & Abilities Sengoku used AdCoC + Internal Destruction CoA first..

[Rootbeer]

Ofc it's CoC Attack, that's why He was confirmed as CoC User in Viver Card
But No, He ain't First to showcase Adv. CoC, WB & Shanks Clash was First
Same for Adv. CoA, Rayleigh removing Collars happened before Sengoku's Feat

I didn't say the first to showcase AdCoC.. But the first to showcase the combination of AdCoC + Internal Destruction CoA..

Level 2 CoC + Level 3 CoA