Living Bone

Living Bones (リビングボーン) are enemies from Kingdom Hearts II.

Living Bones are fossil Heartless that appear only in the Pride Lands. They are some of the stronger enemies in the game, and are in the same ranks as other formidable foes such as Devastators and Assault Riders. By using their Reaction Command, Sora can decapitate them.

Living Bones are sometimes rode on by Shamans. This forms a powerful relationship—the Living Bone's strength and the Shaman's magic make it even more intimidating. If the Living Bone a Shaman is riding on is defeated, the Shaman is defeated along with it.

There is a close resemblance between Living Bones and the Groundshaker. It is plausible that the two are somehow related.

Journal Entry
''Make sure to dodge its strong attacks as they deal huge damage. Weaken it instantly by crushing its head with the reaction command!''

With a shaman, it powers up to unleash deadly curses, but merely defeat it as you would a shaman.