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There is a thread already made for chat about this topic - http://www.thedarktower.org/palaver/showthread.php?t=2481&highlight=Keystone

Letti, could you merge this with that one?

I think his kas-ka Gan's at some deep level know, like King did as evidenced in his trance, that they are not the true author but the teller of Gan's tale or the Singer of Gan's song if you'd prefer.

Need, or want...and if so, why?

I don't understand why Gan needs a kas-ka. Its something to think about.

When Roland puts Sai King into a trance at his home:

"Roland raised his mutilated right hand. 'When you do, you'll start with how I lost my fingers. Do you remember?'
'Lobstosities,' King said....

How I see it is Gan created all the worlds within himself...remember the multiverse IS the Dark Tower too, and so the multi-verse is Gan. Of course there is the Outer Dark, the worlds of darkness and...

I don't believe this. The worlds were created by Gan, I don't think they are tied together by way of King's stories, they are tied together by the Beams. King's role is of a facilitator or singer of...

This is exactly how I feel.

So you believed him when he believed they were beyond ka?