Infinite Engine (Black Blood Saga)

The Infinite Engine was a creation of the Thirteen Darkness, a device of such great supernatural power that if used correctly, could be used to overthrow the Light in a great many different ways. In basics, it is a form of semi-perpetual power, and under the right conditions could generate infinite energy.

Design
The Infinite Engine was created by the ancient Dark Empire, itself being the bastion of marvels of engineering of that time, the Infinite Engine was a side-project that the Dark Emperor and his twelve Lieutenants all pitched in to work upon.

The Dark Emperor sought to give it an ultimate source of energy, that when bound to a Dark Keyblade, would activate. To this end, he collected the Hearts from Heartless slain during the early half of the Keyblade war. He took these hearts, combined them and compressed them, fused them into a single entity.