A Powerful Youkai Sealed in Oosugi
This youkai was imprisoned within Oosugi, a massive tree, but managed to place a lethal curse on Natsume before its containment fully took hold. The curse would've killed him in just five days. Hinoe stepped in to help Natsume summon protective shiki to shield him from the youkai's power—a temporary solution to an otherwise dire situation.
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