Corporeal Beast - The RuneScape Wiki

The Corporeal Beast is the physical incarnation of the Spirit Beast, and is a boss monster. It requires completion of Summer's End to fight. The Corporeal Beast was brought into existence when the Spirit Beast was killed at the end of Summer's End; as everything within the Spirit Realm represents the opposite of its version on Gielinor, the death of the Spirit Beast in the Spirit Realm caused the creation of the Corporeal Beast in Gielinor. The Corporeal Beast resides in the Gielinor version of the caverns in which the Spirit Beast was trapped and destroyed.

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