Naraku will take form of a spider when you first see him in the cave where you meet Kohaku and the two flying bat demons. Kagura will help you for one demon to become free she says when the door opens. Naraku will send a Miasma and you cannot get through it. However, Kagura will use "Dance Of Blade" and defeat the puppet. Then, Naraku will take Kagome's Shard and absorb it into his spider body and change form. The key to winning is to use Inuyasha's "Wind Scar", and whoever your character's Shikigami Powers and Sango becasuse they are the strongest.