Ok so in birth by sleep, in the keyblade graveyard during the climactic battle, xehanort does something that confuses me a bit. he conjures a ball of darkness in his hand and fires it into the clouds above, where after the clouds disperse and kingdom hearts can be seen shining down over head... my question is, how does he do this? it is said that during the keyblade war, after the X-Blade was shattered, darkness swallowed kingdom hearts, never to be seen again... yet somehow, Xehanort is able to summon it just like that? is there something i am missing?