This hasnt changed? You still need those things to change things. Idk where you guys are getting this mentality that Teach doesnt need One Piece first. He literally attacked Law for his RPs and kidnapped Pudding for her 3rd eye.
He ambushed Law because of timing, they just finish beating Kaido and Bigmom and have the poneglyphs. He is also targeting Holy Land at the meantime, having Lafitte doing the spy duty. And with just 3 poneglyphs and no ancient weapons, he told them to get ready.
