Chapter 546 Spoiler
Courtesy of Anonymous on 2ch.net and Patches
Inuyasha v55 ch546 "Naraku's Wish" (Naraku no Nozomi)
犬夜叉 第546話 「奈落の望み」
The Shikon no Tama has… become one with Naraku! In his strengthened form, even Meidou Zangetsuha can't swallow him.
The Shikon no Tama was burned along with Kikyou's corpse, and was supposed to disappear from this world. However, utilizing Kikyou's lingering thoughts of Inuyasha, it was reborn in Kagome and used her body to return to this world. Even shattered, it spread calamity while being gathered, even crossing through time. The Shikon no Tama absolutely will not disappear. Even if… I (Naraku) am destroyed.
Eh…? Naraku… what did… you really want to achieve? While you've been fighting with us… there's only one thing you've done. You broke apart Inuyasha and Kikyou's relationship… made Sango-chan and Kohaku-kun battle each other as siblings, used Miroku-sama and Sango-chan's love for each other against them, ridiculed the bonds between companions, cursed the love between two people, and tried to tear them apart… Why? Was that your wish?
But… the Shikon no Tama didn't grant your real wish, did it. Weren't you confused? The Shikon no Tama transforms the person who absorbed it into a true monster, body and mind… That's why for as long as you've held the whole Shikon no Tama, you haven't tried to absorb it until now.
She hit the right nerve, and Naraku is angered. He shoots spears of shouki. Inuyasha fires Meidou Zangetsuha at the spears and absorbs them, it then takes on a sickle-shape and heads towards Naraku. Naraku takes damage. Wha… that just now was… Meidou Zangetsuha?!