When King was attacking Sanji, he asked him to "vanish". Sanji made it clear that his invisibility was only "visual".
Law's awakening seems to do the opposite of Sanji. He and his weapons are still visible, but they "vanish" materially speaking, i.e. they become intangible, like a ghost.
How does it do this? It fuses objects with "Room". In essence, Paramecia Awakening is the ability to affect other objects. Law's room abilities are extended to other objects. But this opens room for not a whole host of objects:
(1) Law himself fuses with Room. He becomes like a logia to non-Haki users.
(2) Law fuses Kid's metal/attack with Room. They can drop metal objects inside Big Mom, and Kid can attract Big Mom like a magnet. Kid can do something similar to Blackbeard.
Kid can attract or repel Big Mom to whatever directions he wants. Maybe towards Law for a finisher.
(3) Law turns the ground itself intangible. This is like being sucked into a vortex. This could be used to drop Big Mom from Onigashima crashing into Wano.
Law's awakening seems to do the opposite of Sanji. He and his weapons are still visible, but they "vanish" materially speaking, i.e. they become intangible, like a ghost.
How does it do this? It fuses objects with "Room". In essence, Paramecia Awakening is the ability to affect other objects. Law's room abilities are extended to other objects. But this opens room for not a whole host of objects:
(1) Law himself fuses with Room. He becomes like a logia to non-Haki users.
(2) Law fuses Kid's metal/attack with Room. They can drop metal objects inside Big Mom, and Kid can attract Big Mom like a magnet. Kid can do something similar to Blackbeard.
Kid can attract or repel Big Mom to whatever directions he wants. Maybe towards Law for a finisher.
(3) Law turns the ground itself intangible. This is like being sucked into a vortex. This could be used to drop Big Mom from Onigashima crashing into Wano.