Chapter 526 Spoiler (UPDATED)
Courtesy of Anonymous Poster on 2ch.net and our translator, Patches.
Inuyasha v53 ch526 "Unreturned Spiritual Power" (Modoranai Reiryoku)
犬夜叉 第526話 「戻らない霊力」
Sesshoumaru cuts Naraku's tentacles with Bakusaiga, and Sango catches Kohaku when he falls. After Sesshoumaru cut him with Tenseiga, Magatsuhi says "Don't think this is over" and vanishes. On the other hand, Miroku, who had sucked up a part of Magatsuhi before, has had his condition worsen. Everyone intends to return to the village, but Kagome is caught by Naraku.
Magatsuhi: "Don't think… this is over… I'm still…"
Kagome: "It's not over? What does he mean?"
Inuyasha: "Keh, he's just bluffing."
Kohaku: "Does this mean that Magatsuhi still isn't completely dead?"
Sango: "….." (It can't be…)
Kaede is nursing Miroku. A droning sound accompanied by something that looks like youki comes out of Miroku's body.
Kaede: "Th… this is…"