A massive core of energy lay beyond the door sought by the Heartless. It may be the ultimate goal of the Heartless. But
what is that energy? I have devised a hypothesis, based upon my observations of the Heartless.
The Heartless feed
on other's hearts, and they yearn for that energy core. That thing beyond the door must be a heart, too--the heart of this
world. There is no proof, but, having felt that immense energy, I am certain. That was the heart of the world.
Heartless are trying to take hearts not only from all living creatures, but from the planet itself. But what do they mean
to do with the heart of the world?