[douglas]

About Kibin's hit points, I did a little more searching for the clause about constitution changes due to polymorph not changing HP that I thought I remembered, and here's what I found:

Kaylin's Great Warping is based on Shapechange IIRC
Shapechange is "like polymorph, except..."
Polymorph is "like alter self, except..."
Alter Self says "Your class and level, hit points, alignment, base attack bonus, and base save bonuses all remain the same."
The only mention of hit points in the exceptions noted in Polymorph and Shapechange is the target of Polymorph healing as if having rested for one night.

I'm not entirely sure which way this is supposed to be interpreted. Polymorph makes no mention at all about hit points changing due to changing constitution, either to say that it does or that it doesn't. A strict reading would say that max hit points stay the same because no exception to that provision is noted, but it could easily just be a minor oversight on the part of whoever wrote the Polymorph spell description. On the other hand, it could be a balancing factor to avoid people polymorphing into something with insanely high constitution just to gain HP. I have checked both errata and the D&D FAQ on wizards.com, and neither of them mentions the issue.