I mean the damage-by-compression using ferromagnetism stuff Oda had going for him was pretty unique and is indicative of Oda being creative with his fruit. But Oda quickly abandoned that and just had Kid going straight Undertaker on Kaido when we know blunt force damage isn’t doing much at all, that was weird. Though without ryou, the only route Oda is going take is more magnetism related abilities.
Maybe antiferromagnetism this time?
Manipulate the iron molecules inside Kaido and cause internal damage, sounds good if I say so myself